baber/WOPTO huggingface dataset:
Patent KR-20090026990-A (KR)
Title: Pigment dispersion composition, resist composition for color filter including the same, and color filter using the same
Inventor: LEE CHANG MIN
IPC: G03F7/004
Filed: 2007-09-11
Abstract: A pigment dispersion composition is provided to increase resolution and to reduce residue in forming patterns, and to realize micro-patterns with high resolution in exposure and development. A pigment dispersion composition comprises pigment, binder resin, solvent and dispersant. The dispersant comprises the first dispersant represented by the formula 1 and the second dispersant represented by the formula 2. In the chemical formulae, R1-R6 are independently hydrogen atom or alkyl group; R7-R13 are anyone selected from the group consisting of substituted or unsubstituted alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, arylalkyl group, cycloalkyl group, heterocycloalkyl group, cyclo alkenyl group, cycloalkynyl, alkoxy, alkylamino group, and alkanol group; m is 30-70 mole %; n is 30-70 mole %; and K and k' are independently an integer of 0-18.
Patent KR-20090027075-A (KR)
Title: Beam, structure, parking structure having the beam, method of manufacturing the beam and method of manufacturing structure without column
Inventor: LEE HYUN IL
IPC: E04C3/04
Filed: 2007-09-11
Abstract: A beam is provided that the height of structure is reduced and the post within structure can be gotten rid of since the second H-beam is connected to the first and the third H-beam. A beam comprises first, second and third H-beam successively connected to a first flange(211), a second flange(212) and center web(213), a first reinforcing member(220) including the first compression flange and the first reinforced web(222), a second reinforcing flange(231) which faces the center of the second flange from the second end of the second flange of the third H-beam and in which the separation distance is formed in order to become smaller, a second reinforcing member(230) including the second reinforced web(232) connecting the second flange of H-beam and the second compression flange.
Patent KR-20080027192-A (KR)
Title: Process for producing cycloalkanol and/or cycloalkanone
Inventor: HOSHINO MASAHIRO
IPC: C07C29/50
Filed: 2007-09-21
Abstract: A method for preparing cycloalkanol and/or cycloalkanone is provided to produce the cycloalkanol and/or cycloalkanone with high selectivity by oxidizing cycloalkane with good conversion ratio. A method for preparing cycloalkanol and/or cycloalkanone includes a step of oxidizing cycloalkane with oxygen at 25-40 C in the presence of mesoporous silica containing group 8 and/or 9 elements on the periodic table, wherein phosphorous atoms in the mesoporous silica are contained in an amount of 0-4 mol% of silica atoms. The element is cobalt. The meso porous silica is MCM-41. The cycloalkane is cyclohexane.
Patent KR-20090032247-A (KR)
Title: Semiconductor memory device
Inventor: HONG JI HO
IPC: H01L21/336
Filed: 2007-09-27
Abstract: A semiconductor memory device is provided to highly integrate the cell array structure of the semiconductor memory device by securing the exact process margin between a contact and a gate line. The first and second active regions(110,120) are formed into the N+ diffusion region. The first and second active regions comprise a channel region, a source region, and a drain region. The first and second active regions comprise horizontal lines. A contact(160) is formed in the end of the upward extended part. The first gate line(130) and the second gate line(140) are formed with the parallel to vertical line. The third gate line(150) is overlapped at both ends of the second active region.
Patent KR-20090036028-A (KR)
Title: A composition and a method for inducing apotosis of cancer cell using dek overexpression and a drosophila melanogaster overexpressing dek
Inventor: SEO SANG BEOM
IPC: A61P35/00
Filed: 2007-10-08
Abstract: An anti-cancer composition containing DEK proteins or nucleic acid coding the DEK proteins is provided to induce apoptosis and inhibit dysplasia of cancer cells by overexpressing DEK to increase caspase-dependent apoptosis. An anti-cancer composition for inducing apoptosis comprises DEK proteins having amino acid sequence of SEQ ID NO:2 or nucleic acid for coding DEK protein having base sequence of SEQ ID NO:1. A transformed drosophila is prepared to overexpress the DEK proteins. The transformed drosophila is obtained by a pUAS-hDEK recombinant vector containing the nucleic acid for coding the DEK proteins. The anti-cancer composition containing the DEK proteins or the nucleic acid coding the DEK proteins is used for treating or preventing cancer.
Patent KR-20090038157-A (KR)
Title: A manufacturing method of mini sweetpotate
Inventor: LEE HEUNG SOO
IPC: A23L19/00
Filed: 2007-10-15
Abstract: A method for preparing small-sized sweet potato is provided to improve visual flavor and enable a consumer to take nutrients from the small-sized sweet potato with ease. A method for preparing small-sized sweet potato comprises the following steps of: washing sweet potato, steaming the washed sweet potato and peeling the skin of the sweet potato; adding egg, condensed milk, sugar, alcohol and palm oil to peeled sweet potato and kneading the ingredients to make dough; maturing the dough at 34°C; molding the matured dough in a predetermined shape; coating leafing powder on a surface of the molded dough and coating purple sweet potato powder in order to primarily surface-process the dough; re-coating the dough with the purple sweet potato powder to secondarily surface-process the dough; and baking the dough in an oven.
Patent KR-20080034813-A (KR)
Title: Combined file format for digital multimedia broadcasting (dmb) content, method and apparatus for handling dmb content of this format
Inventor: KIM HUI YONG
IPC: H04N5/445
Filed: 2007-10-17
Abstract: A combined file format for a DMB(Digital Multimedia Broadcasting) content, a method and an apparatus for handling the DMB content of the file format are provided to store desired broad contents in a remote storage through communication network connected with a portable terminal, to watch DMB contents, and to enhance sharing/exchanging the contents among other terminals by using the specific information metadata and the protection/management metadata. A file format for a digital multimedia broadcasting(DMB) content integrates the DMB content, the specific information metadata, and the protection/management metadata. The DMB content includes at least one of DMB video, DMB audio and data. The specific information metadata describes the specific information of the DMB contents. The protection/management metadata describes the information of the protection and management of the DMB contents. The DMB video is decoded with MPEG-4 AVC. The data contents are transmitted through at least one protocol of a DLS(Dynamic Label Segment), an MOT(Multimedia Object Transfer), and a TDC(Transparent Data Channel).
Patent KR-20090041534-A (KR)
Title: Compressor motor starting box of train
Inventor: CHOI SUNG GYU
IPC: B61K13/00
Filed: 2007-10-24
Abstract: An air compression motor controller of a railway vehicle is provided to prevent the railway vehicle from being stopped in case an air compression motor circuit breaker is automatically blocked due to unexpected high current supply by supplying electric power to the air compression motor of the air compression feeding mechanism. An air compression motor controller(100) of a railway vehicle comprises: an air compression motor circuit breaker(110) which is automatically blocked in case the high current over constant level is supplied; a variable voltage frequency inverter(120) which is serially connected between the air compression motor circuit breaker and the air compression motor; an air compression motor delay circuit breaker(160) which is connected parallel to the air compression motor circuit breaker; a contactor(140) artificially blocking 3 phase electricity supply; a current measuring device(170) measuring the current amount; a reactor contactor(150) blocking 3 phase electricity supply; and a high current breaking controller(180) blocking the reactor contactor.
Patent KR-20090042605-A (KR)
Title: Apparatus and controlling method for preventing mal-operation of sudden pressure relay system for transformer
Inventor: SEO HWANG DONG
IPC: H02H7/04
Filed: 2007-10-26
Abstract: An apparatus for preventing the malfunction of SPR(Sudden Pressure Relay) for a transformer and a control method thereof are provided to operate the SPR selectively according to the size of the external fault current in the trouble of the external line of the transformer. An apparatus for preventing the malfunction of SPR(Sudden Pressure Relay) for a transformer includes an OCR(Over Current Relay)(20), the SPR(30), and a controller. The OCR operates by corresponding to the trouble of the external line of the transformer. The SPR operates by corresponding to the trouble inside the transformer. The controller generates a trip signal for controlling the operation of the transformer selectively after determining the operation state and the operation sequence of the OCR and the SPR and the operation duration of the SPR. When the OCR dose not operate and the SPR operates, the controller generates the trip signal.
Patent KR-20090044251-A (KR)
Title: 통신 모듈
Inventor: KIM DONG YOUNG
IPC: H04B1/40
Filed: 2007-10-31
Abstract: 실시예는 전력 증폭기를 포함하는 통신 모듈을 제공한다. 실시예에 따른 통신 모듈은, 송신 신호를 출력하는 베이스밴드부, 상기 베이스밴드부에서 출력된 신호를 입력 받아 RF신호를 생성하는 트랜시버, 상기 트랜시버로부터 제공되는 RF 신호를 증폭시키는 전력증폭부, 상기 전력증폭부에 공급되는 바이어스 전원의 바이어스포인트를 튜닝하는 전력조정부 및 상기 전력증폭부로부터 제공되는 신호를 입력받는 듀플렉서를 포함한다. 이로써, 실시예는 통신 모듈에서 전력 증폭기의 바이어스 포인트의 튜닝을 담당하는 전력 조정부를 인덕터로 형성함으로써 설계가 용이하고 간단하다. 
       
     전력 증폭기, 인덕터, 바이어스 포인트
Patent KR-20090053199-A (KR)
Inventor: JUNG HAE OK
IPC: F04B39/00
Filed: 2007-11-22
Abstract: 본 발명은 압축기용 모터 및 이를 적용한 왕복동식 압축기에서 알루미늄 코일을 적용하는 기술에 관한 것이다. 본 발명에 의한 압축기용 모터 및 이를 적용한 왕복동식 압축기는, 압축기용 모터에서 구리 코일에 비해 가격이 크게 저렴한 알루미늄 코일을 사용하고 메인슬롯부와 서브슬롯부의 단면적과 개수를 사용조건에 맞게 설계함에 따라 압축기용 모터 및 왕복동식 압축기의 재료비용을 크게 절감할 수 있다. 또, 20슬롯 고정자의 경우 코일의 직경 대비 슬롯부의 개구측 넓이 비율을 적정하게 설계하여 알루미늄 코일을 사용함에 따른 모터 효율의 저하를 미연에 방지할 수 있다. 
       
     왕복동식 압축기, 압축기용 모터, 고정자, 알루미늄 코일
Patent KR-20090054554-A (KR)
Title: 절약형 음료수 팩
Inventor: BAE SUNG HEE
IPC: B65D85/72
Filed: 2007-11-27
Abstract: 본 발명은 음료수 팩 내부의 바닥면을 경사지게 구성한 음료수 팩에 관한 것으로서, 종래 음료수 팩의 평평한 바닥면 때문에 발생하는 음료수 섭취의 불편함을 해소하기 위한 것이다. 
       
     음료수 팩, 빨대, 경사진 바닥
Patent KR-20080049654-A (KR)
Title: Semiconductor device
Inventor: NATORI KATSUAKI
IPC: H01L27/115
Filed: 2007-11-29
Abstract: A semiconductor device is provided to suppress interference between cells and to improve characteristics thereof by shielding electric field between adjacent floating gate electrodes. A memory cell array is formed on a semiconductor substrate(10). The memory cell array includes a plurality of memory cells which are arranged on the semiconductor substrate. Each of the memory cells includes a first insulating layer(11) formed on an upper surface of the semiconductor substrate, an accumulated charge layer formed on the first insulating layer, a plurality of second insulating layers(19-23) formed on the accumulated charge layer, and a control electrode. The control electrode is formed by inserting the second insulating layer onto the accumulated charge layer. The control electrode is made of a metal or a metal silicide. In a channel width direction of the memory cell, a lower angle of the control electrode is formed with a semiconductor.
Patent KR-20090056057-A (KR)
Title: Continuous casting method for preventing fromm break out
Inventor: YANG JUNG SEUNG
IPC: B22D11/00
Filed: 2007-11-29
Abstract: A continuous casting method for preventing break-out is provided to increase the efficiency in continuous casting of billets for steel reinforcement and reduce the risk of safety accident. A continuous casting method for preventing break-out is characterized in that the content of manganese in alloy composition of molten steel(2) is set within the range, manganese wt% > 2.5 x silicon wt% + 0.15, in order to prevent slab burst by solid mold slag. When the content of manganese is lowered to 0.2~0.8 wt% the content of silicon is also lowered, satisfying manganese wt% > 2.5 x silicon wt% + 0.15. A steel reinforcement casted by the continuous casting method is composed of carbon(C) 0.1~0.4 wt%, silicon(Si) 0.1~0.3 wt%, manganese(Mn) 0.2~1.5 wt%, phosphorus(P) less than 0.08 wt%, sulfur(S) 0.06 wt%, and the rest of iron(Fe).
Patent KR-20080053905-A (KR)
Title: Thin film transistor device, image display device and manufacturing method thereof
Inventor: SHIBA TAKEO
IPC: H01L29/78
Filed: 2007-12-11
Abstract: A thin film transistor device, an image display device, and a manufacturing method thereof are provided to reduce a manufacturing cost by reducing the number of processes. A thin film transistor device includes a matrix array part(6) having a plurality of circuit blocks and a peripheral integrated circuit part(4a,4b) formed with a plurality of circuit blocks arranged on the periphery of the matrix array part. A circuit element of the matrix array part is composed of an organic semiconductor TFT device. The peripheral integrated circuitry is formed with at least one of a Si transistor device and a poly Si-TFT device. The circuit element and at least one of the Si transistor device and the poly Si-TFT device are installed on a same substrate(7). An electrode of the organic semiconductor TFT device is connected to an electrode of at least one of the Si transistor device and the poly Si-TFT device by using a wiring layer(5).
Patent KR-20090061286-A (KR)
Title: Method of manufacturing toner having uniform particle distribution and the toner manufactured by using the method
Inventor: LEE JI HOON
IPC: G03G9/08
Filed: 2007-12-11
Abstract: Provided are a method for manufacturing a toner with uniform particle distribution and a toner manufactured by the same. A method for manufacturing a toner with uniform particle distribution comprises a step of membrane-emulsifying a disperse phase by passing the disperse phase including a monomer mixture through a continuous phase including an aqueous dispersion liquid prepared by dissolving a dispersant in order to polymerize a toner resin. The monomer mixture contains monomers for binder resin, a charge control agent, pigment, wax and a molecular weight control agent. The membrane is selected from the group consisting of porous alumina, porous zirconia and porous glass SPG having 0.5-5micrometer of pores. In the membrane-emulsifying step, 10~500 kPa of pressure is applied to the disperse phase.
Patent KR-20090061382-A (KR)
Title: Apparatus for breeding scapharca broughtonii
Inventor: BAEK YONG SUNG
IPC: A01K61/00
Filed: 2007-12-11
Abstract: An apparatus for cultivating scapharca broughtonii is provided to improve the production yield of scapharca broughtonii remarkably by using a scapharca broughtonii cultivation dock using the cultivation soil. An apparatus for cultivating scapharca broughtonii comprises a scapharca broughtonii cultivation dock(10) which contain the cultivation soil and is provided with a seawater intake/discharge door; a seawater filtration part(30) which is mounted to the seawater intake/discharge door to filter seawater; a monitoring part(40) which monitors the inside of the scapharca broughtonii cultivation dock; a seed shell maintenance unit(100) which sows the seed shells of scapharca broughtonii to the cultivation soil; and a central control part(C) which controls the inflow and discharge of the seawater into the scapharca broughtonii cultivation dock.
Patent KR-20090062708-A (KR)
Title: Method for dynamic channel allocation of mobile communication system and thereof base station
Inventor: KIM YOUNG LAK
IPC: H04L5/22
Filed: 2007-12-13
Abstract: A dynamic channel allocation method in a mobile communication system and a base station thereof are provided to improve the performance of mobile stations allocated to not only a cross time slot but also a normal time slot by classification into an area where interference is weak and an area where interference is strong to assign a channel of a cross time slot. A base station determines the number of mobile stations assigned to each time slot(S400), determines the number of mobile stations to be assigned to a cross time slot and normal time slot of a heavy zone and a light zone(S402), arranges the all of the mobile stations with each sector according to the distance(S404), assigns time slots to the mobile stations in the order of near distance(S406). Finally, the base station assigns an arbitrary code within a time slot allocated to each mobile station to allocate each channel(S408).
Patent KR-20090065655-A (KR)
Inventor: PAK SUK DAL
IPC: C23G3/02
Filed: 2007-12-18
Abstract: A double filtering apparatus of a degreasing tank is provided to make decrease smooth by supplying alkaline solution to be sprayed to the strip in time, thereby improving quality of the strip. A double filtering apparatus of a degreasing tank comprises a cylindrical chamber(300), a filter which is fixed inside the cylindrical chamber to form a flow space, an outlet pipe(200) which is equipped with an outlet pipe valve and connected to the degreasing tank, a dust discharge pipe(400) which is connected to the filter and equipped with a dust valve, a solution discharge pipe(500) which is connected to an alkali solution tank and equipped with a solution valve, an air purge pipe(600) which is branched from the solution discharge pipe before the solution valve and is equipped with an air valve, and a dust receiver equipped in the bottom of the dust discharge pipe.
Patent KR-20090066981-A (KR)
Title: Bluetooth bang
Inventor: CHO YONG YUN
IPC: G08B21/00
Filed: 2007-12-20
Abstract: An apparatus for preventing miss and robbery using a Bluetooth is provided to prevent miss of bag by attaching a terminal on a bag. An apparatus for preventing miss and robbery of bag using a Bluetooth comprises a main processor, Bluetooth link manage part, Bluetooth signal control part, Bluetooth wireless transmitting and receiving part, data storage part, alarm generator, direction detector, information display part. The main processor performs interface function for microprocessor, codec, vocoder, mobile communication with one chip.
Patent KR-20090068948-A (KR)
Title: Process for operating and removing odor and hydrocarbons in exhaust air stream in tire manufacturing plant
Inventor: KIM SEUNG WOOK
IPC: C08J11/00
Filed: 2007-12-24
Abstract: A method for treating the operation of the exhausted air containing the rubber smell and hydrocarbons in a tire manufacture factory is provided to reduce the operation cost remarkably by connecting the exhausted air to an incineration furnace for direct combustion. A method for treating the operation of the exhausted air containing the rubber smell and hydrocarbons in a tire manufacture factory comprises the steps of filtering the granular material in the rubber mixing agent from the exhausted air containing the rubber smell and hydrocarbons generated during the vulcanization connected with the refining mixer of tires by using a prefilter(14), and removes completely the granular material and the oily dust by using a dust collector(15); mixing the exhausted air where the granular material and the oily dust are removed and the air containing not dust and containing smell and hydrocarbons, filtering the particles not filtered in the exhausted air through three steps, and adsorbing and concentrating it together with fresh air at a Rota zeolite concentrator(24); thermally desorbing it to make it be high concentration, and incinerating it at a catalyst combustion device(31); and discharging the exhausted air burned at the catalyst combustion device and the exhausted air post-adsorbed at the Rota zeolite concentrator to the outside.
Patent KR-20090070258-A (KR)
Title: Procedure for estimating real-time pointing region using 3d geometric information
Inventor: HAN YUN SANG
IPC: G06T7/60
Filed: 2007-12-27
Abstract: A procedure for estimating a real-time pointing region by using 3D geometric information is provided to estimate a region pointed by a human hand by using 3D geometric information with a simple system. A reflection matrix for a camera used to obtain a pointing image is obtained(S11), and human parts for specifying the pointed region is detected(S12). A 3D coordinate for a human body is obtained by using the reflection matrix(S13). The region that points out a pointing image is determined by using the 3D coordinate(S14).
Patent KR-20090071175-A (KR)
Title: Work roll of rolling mill
Inventor: CHUNG JEA SOOK
IPC: B21B27/02
Filed: 2007-12-27
Abstract: A work roll of a rolling mill is provided to control the crown property and planarity of the board material together at the same time, since they are not interfered in each other in the rolling of the board material. A work roll of a rolling mill comprises: a crown restriction part(120) equipped in a rolling region toward a task cut-back end range of a board material(10); and a wave restriction part(110) equipped in the rolling region about the other domain of the board material excepting the crown restriction part. The work roll is arranged at the top and lower part of the board material in order to arrange the crown restriction part at the opposite direction each other. The crown restriction part is consisting of an incline formed at the end part rolling region of the board material. The wave restriction part is consisting of a curved part formed at the rolling region of the rest board material excepting the crown restriction part.
Patent KR-20070043993-A (KR)
Inventor: HEESEMANS MICHAEL
IPC: G06T19/00
Filed: 2005-07-21
Abstract: 데이터 처리 시스템은 가상 객체를 렌더링하기 위한 디스플레이 모니터, 및 사용자가 렌더링된 객체와 상호작용하게 하기 위한 터치 스크린을 구비한다. 이 시스템은 사용자가 객체 상의 제1 위치에서 객체의 형상을 변경하는 것을 가능하게 하도록 작동한다. 이 형상은, 시스템의 작동 사용중에 터치 스크린을 통해 보일때, 제1 위치와 실질적으로 일치하는 터치 스크린 상의 제2 위치에 등록된 압력의 크기의 제어하에서 변경된다.
Patent KR-20070032049-A (KR)
IPC: H01L21/3205
Filed: 2005-07-06
Abstract: 본원에는 질화 알루미늄, 산화 알루미늄, 옥시질화 알루미늄 또는 그의 조합물 중 하나 이상을 포함하는 균열이 없는 보호 코팅이 개시되어 있다.  본원에는 질화 알루미늄, 산화 알루미늄, 옥시질화 알루미늄 또는 그의 조합물 중 하나 이상을 포함하는 보호 코팅을 열분해성 질화 붕소, 열분해성 흑연 및/또는 탄소 도핑된 질화 붕소를 포함하는 기판위에 침착시킴을 포함하는, 제품의 제조 방법도 또한 개시되어 있다.
Patent KR-20070054196-A (KR)
Inventor: SEO KANG SOO
IPC: G11B20/10
Filed: 2005-09-13
Abstract: 기록 매체는 데이터 영역 및 데이터 관리 영역을 포함한다.  상기 데이터 영역은 서로에 대해 다른 데이터 포맷을 갖는 제1 및 제2 타이틀을 포함한다. 상기 데이터 관리 영역은 제1 및 제2 타이틀의 재생하는 데 필요한 복수의 데이터 관리 파일을 포함한다. 상기 데이터 관리 파일은 상기 제1 타이틀의 재생과 연관된 제1 관리 정보를 포함하는 제1 오브젝트 파일과, 상기 제2 타이틀의 재생과 연관된 제2 관리 정보를 포함하는 제2 오브젝트 파일을 포함한다. 예컨대, 상기 제1 타이틀은 무비 타이틀이고, 상기 제2 타이틀은 자바 타이틀이며, 상기 제1 오브젝트 파일은 무비 오브젝트이며, 상기 제2 오브젝트 파일은 하나 이상의 자바 오브젝트 파일이다. 
       
     기록 매체, 데이터 영역, 자바 오브젝트 파일, 무비 타이틀, 자바 타이틀
Patent KR-20070053743-A (KR)
Inventor: ELDRIDGE BENJAMIN N
IPC: G01R31/26
Filed: 2005-08-19
Abstract: 아주 미세한 피치 간격으로써 제조될 수 있으며 지지 기판상에 아주 정확하게 배치될 수 있는, 웨이퍼 테스트 프로빙에 사용하기 위한 탄성 스프링 접촉부들이 제공된다.  탄성 접촉 구조들은 스페이스 트랜스포머 기판상의 전기 회로로의 와이어 본딩을 위해 적응된다.  스프링 접촉부들이 부착된 지지 기판들은 다같이 대량으로 제조되어 다이싱될 수 있고 스페이스 트랜스포머 기판에 부착하기 전에 테스트될 수 있어, 수율을 향상시킨다.  탄성 스프링 접촉부들은, 스프링 접촉부들이 지지 기판에 접착되고 해제층이 제거되기 전에, 해제층상에 접촉부들을 형성하도록, 포토리소그래피 기술들을 사용해 제조된다.  지지 기판은 접촉부들의 정렬 및 아래쪽 광학 부품들의 테스팅을 허용하도록 투명할 수 있다.  지지 기판은 향상된 임피던스 매칭을 위해 스프링 접촉부들 아래에 제공되는 접지면을 포함할 수 있다.  
       
     탄성 접촉 구조, 스페이스 트랜스포머, 포토리소그래피, 임피던스 매칭,
Patent KR-20070073836-A (KR)
Title: Optically active 4,4-disubstituted oxazolidine derivative and method for producing same
Inventor: ONODA TOSHIHIKO
IPC: C07D413/06
Filed: 2005-10-26
Abstract: Disclosed are an optically active 4,4-disubstituted oxazolidine derivative and a method for producing the same. Specifically disclosed is an optically active 4,4-disubstituted oxazolidine derivative represented by the following formula (I). (I) (In the above formula, R1 represents a formyl group, hydroxymethyl group, COOR, halogenated methyl group, phosphonium methyl group or the like; R represents a C1-C6 alkyl group or the like; R2 represents a C 1-C6 alkyl group, C3-C10 cycloalkyl group or the like; R3 represents a C2-C6 alkanoyl group, C1-C6 alkyloxycarbonyl group or the like; and R4 represents a C 1-C6 alkyl group or C2-C6 alkenyl group.