baber/WOPTO huggingface dataset:
Patent WO-2020159093-A1 (WO)
Inventor: LEE HONG GU
IPC: H04N21/8549
Filed: 2020-01-07
Abstract: 본 발명의 실시예에 따른 생체 데이터를 이용한 하이라이트 영상 생성 방법 및 그 장치가 제공된다. 본 발명의 실시예에 따른 하이라이트 생성 장치의 프로세서에 의해서 수행되는 사용자의 생체 데이터를 이용한 하이라이트 영상 생성 방법에 있어서, 사용자의 뇌파 및 시선 데이터 중 적어도 하나를 포함하는 생체 데이터를 획득하도록 구성된 헤드 마운트 디스플레이(Head-Mounted Display, HMD) 장치를 통해서 멀티미디어 콘텐츠를 제공하는 단계; 상기 HMD 장치를 통해서 상기 멀티미디어 콘텐츠에 연관된 생체 데이터를 획득하는 단계; 상기 획득된 생체 데이터에 기반하여 상기 사용자가 주목한 적어도 하나의 부분 콘텐츠를 검출하는 단계; 상기 검출된 적어도 하나의 부분 콘텐츠에 연관된 상기 사용자의 감정 상태를 유추하는 단계; 및 상기 유추된 감정 상태에 따라 하이라이트 영상을 생성하는 단계를 포함한다.
Patent WO-2020153727-A1 (WO)
Inventor: CHOI HEESEUNG
IPC: B25J9/16
Filed: 2020-01-21
Abstract: Selon un mode de réalisation, la présente invention porte sur un dispositif électronique comprenant : un boîtier ; une unité d'entraînement destinée à déplacer le boîtier ; une unité de montage de batterie formée dans le boîtier de façon à permettre la mise en place de batteries, l'unité de montage de batterie comprenant une première fente permettant la mise en place d'une première batterie et une seconde fente permettant la mise en place d'une seconde batterie ; un dispositif séparateur, disposé sur l'unité de montage de batterie, permettant de séparer la première batterie de la première fente ou de séparer la seconde batterie de la seconde fente ; et un processeur connecté électriquement à l'unité d'entraînement et au dispositif séparateur, le processeur pouvant commander le dispositif séparateur de telle sorte qu'il sépare la seconde batterie de la seconde fente lorsque la première batterie est mise en place dans la première fente, et sépare la première batterie de la première fente lorsque la seconde batterie est mise en place dans la seconde fente. De plus, différents autres modes de réalisation sont possibles.
Patent WO-2021182673-A1 (WO)
Title: Calf compression brace
Inventor: CHO BONG JOON
IPC: A61F5/01
Filed: 2020-04-28
Abstract: The present invention comprises: a body part (10) of which the top has an area larger than that of the bottom thereof; compression strength adjustment parts (20) for adjusting the strength of compressing a calf; compression bands (80) connected to the compression strength adjustment parts (20) so as to tighten and secondarily compress the calf; an attachment part (90) having dials (31, 32, 33) attached to the outside thereof, and having Velcro formed on the interior side thereof; and a napped part (91) attached to the Velcro on the interior side of the attachment part (90).
Patent WO-2021261631-A1 (WO)
Inventor: SEO JAE GU
IPC: A61P29/00
Filed: 2020-06-26
Abstract: The present invention relates to a novel Picalibacterium prosnitch strain EB-FPDK9 and to uses thereof, wherein a composition comprising one or more selected from the group consisting of the Picalibacterium prosnitch( F. prausnitzii ) EB-FPDK9, culture broth, lysates or an extract of the strain, when ingested, has an effect of preventing, alleviating, and treating inflammatory diseases, liver diseases, or metabolic diseases.
Patent WO-2021006619-A1 (WO)
Inventor: LEE HYUN MI
IPC: A61K39/00
Filed: 2020-07-08
Abstract: The present invention relates to an anti-B7-H3 antibody binding specifically to B7-H3 and a use thereof and, more particularly, provides an anti-B7-H3 antibody or an antigen binding fragment thereof, a nucleic acid coding therefor, a vector carrying the nucleic acid, a cell transformed with the vector, a method for preparation of the antibody or the antigen binding fragment thereof, an antibody-drug conjugate or multi-specific antibody comprising the antibody or the antigen binding fragment thereof, and a pharmaceutical composition for prevention or treatment of cancer, autoimmune disease, or inflammatory disease, or a diagnostic composition, each composition comprising same. The anti-B7-H3 antibody or the antigen binding fragment thereof according to the present invention can bind to human and non-human B7-H3 at high affinity and can be introduced into cells after binding thereto. Thus, the anti-B7-H3 antibody or the antigen binding fragment thereof, or the antibody-drug conjugate or multi-specific antibody comprising same can be advantageously used for preventing, treating, or diagnosing cancer or tumors, autoimmune disease, or inflammatory disease.
Patent WO-2022030669-A1 (WO)
Title: Query-based deep learning inference system and method therefor
Inventor: LEE JUN HYEOK
IPC: G06N3/08
Filed: 2020-08-11
Abstract: The present invention discloses a query-based deep learning inference system and method therefor, wherein a deep learning framework is connected to an information database, in a plugin form, such that data stored in the information database is learned via a deep learning method according to a request query of a user, thereby inferring data corresponding to a query. The disclosed query-based deep learning inference system may include: a database for storing a data set, a learning network model, a learning parameter, and a learning result; the deep learning framework connected to the database, in a plugin form, identifying and modifying information or data stored in the database, and adding new data; and a user terminal for inputting a query through the deep learning framework and receiving an inference result corresponding to the query from the database through the deep learning framework.
Patent WO-2022045403-A1 (WO)
Title: Personalized nerve stimulator
Inventor: SONG JAE JUN
IPC: A61N1/36
Filed: 2020-08-28
Abstract: A personalized nerve stimulator according to an embodiment comprises: a first body part which is disposed across the front and rear of an ear; a second body part which is rotatably connected to the first body part; and a controlled electrode part which is coupled to the second body part and is brought into contact with the auricle or external auditory meatus of the ear, wherein the position of the controlled electrode part can be controlled according to the shape of the auricle or external auditory meatus so as to stimulate the vagus nerve distributed in the auricle or external auditory meatus.
Patent WO-2021066405-A1 (WO)
Inventor: KIM TAEHYEONG
IPC: B01D63/10
Filed: 2020-09-25
Abstract: The present specification provides a feed side spacer and a separation membrane element comprising same.
Patent WO-2021096275-A1 (WO)
Title: Fusion protein including modified interleukin-7 and tgf beta receptor ii and use thereof
Inventor: SUNG YOUNG CHUL
IPC: C07K14/54
Filed: 2020-11-13
Abstract: The present invention relates to a fusion protein including modified interleukin-7 and TGF beta receptor II and use thereof. The fusion protein has a high production yield and can effectively inhibit cancer, and thus can be usefully utilized in the treatment of cancer or infectious diseases.
Patent WO-2022107908-A1 (WO)
Title: Dispositif de nettoyage portatif utilisant une onde ultrasonore
Inventor: KIM HYUN
IPC: A47L15/13
Filed: 2020-11-18
Abstract: Un dispositif de nettoyage portatif utilisant des ondes ultrasonores selon un mode de réalisation de la présente divulgation comprend : un corps principal ayant une ouverture dans sa partie supérieure ; une unité couvercle qui peut être fixée au corps principal et détachée de celui-ci et qui est conçue pour recouvrir l'ouverture du corps principal ; une unité récipient qui est disposée dans le corps principal, qui peut recevoir un objet à nettoyer et de l'eau de nettoyage, et qui comprend un matériau transparent ou un matériau métallique résistant aux vibrations ; une unité d'injection d'eau de nettoyage qui est placée sur l'ouverture de l'unité récipient de sorte que l'eau de nettoyage puisse être injectée ; plusieurs éléments à vibration ultrasonore formés sur la surface latérale de l'unité récipient ; et une source de lumière ultraviolette qui est agencée sur la partie inférieure du corps principal et qui est conçue pour émettre une lumière ultraviolette vers la partie inférieure de l'unité récipient.
Patent WO-2021125616-A1 (WO)
Inventor: LEE HYANG YONG
IPC: G06N3/08
Filed: 2020-11-30
Abstract: The present invention relates to a method for detecting object data for training for and application of AI, and a system for same, and more specifically, to a method and system for extracting singular points from vectorized object data, detecting objects similar to input object data, and using the similar objects as training data for AI, or as a data processing result of the AI.
Patent WO-2021215621-A1 (WO)
Inventor: PAHK HEUI JAE
IPC: G01N21/95
Filed: 2020-12-31
Abstract: The present invention relates to a coaxial spectral imaging ellipsometer. More particularly, a coaxial spectral imaging ellipsometer according to one embodiment of the present invention comprises: a light source; a light modulation unit for polarizing light from the light source and phase-delaying same; an objective lens for emitting, at a sample, the light modulated by the light modulation unit; an incident angle adjustment unit provided between the light source and the objective lens so as to emit the light at a specific position of the rear focal plane of the objective lens; a beam splitter for guiding the reflected beam reflected by the sample so that same changes path after passing through the objective lens; a polarization analyzer for analyzing the polarization of the reflected beam; a spectral image acquisition unit for acquiring a spectral image from the reflected beam; and a signal processing unit for extracting physical information about the sample by signal-processing the image acquired by the spectral image acquisition unit.
Patent WO-2022039336-A1 (WO)
Title: Method for determining false negative and false positive reactions that can appear in detection of pathogen gene of target disease, using real-time rt-pcr method for viral hemorrhagic sepsis as standard
Inventor: KIM HYOUNG JUN
IPC: C12Q1/6806
Filed: 2021-01-01
Abstract: According to a method for determining false negative and false positive reactions that can appear in the detection of a pathogen gene of a target disease, using a real-time RT-PCR method for viral hemorrhagic sepsis as a standard, presented in the present invention, a synthetic gene including both a nucleotide sequence according to a standardized Jonstrup VHS rRT-PCR method and a nucleotide sequence for target disease detection is cloned into a structurally stable plasmid DNA vector to extract synthetic recombinant plasmid DNA, and detection sensitivities of real-time RT-PCR performed using the DNA are compared so that the detection sensitivity of a pathogen gene of a target disease can be verified, and a highly sensitive gene detection method for a target disease can be established in a short time by adjusting same.
Patent WO-2021150024-A1 (WO)
Title: Document management system using furniture unit, and operating method
Inventor: PARK JIN TAE
IPC: B60B33/00
Filed: 2021-01-21
Abstract: The present invention can comprise: a document search and selection step in which a user searches for and selects a document by means of a terminal; a corresponding furniture unit display step of displaying a corresponding furniture unit in which the corresponding document selected by the user, from among a plurality of furniture units arranged in a specific space, is positioned; a corresponding furniture unit moving step of moving one or more furniture units from among the plurality of furniture units arranged in a specific space so that a plurality of compartments partitioned in the corresponding furniture unit are positioned to be opened to the user; a corresponding compartment display step of displaying a corresponding compartment, from among the plurality of compartments, in which the corresponding document is positioned; a corresponding document collecting step in which the user collects the corresponding document; a furniture unit original position returning step in which the moved furniture unit from among the plurality of furniture units is returned to the original position; and a furniture unit charging step. According to the present invention, the user can quickly and accurately identify the position of the furniture unit in which the document to be retrieved is placed and the position of the compartment of the corresponding furniture unit, and the user can easily collect the corresponding document by switching the arrangement of the furniture units.
Patent WO-2022154158-A1 (WO)
Inventor: IM SANGKYUN
IPC: G09F9/302
Filed: 2021-02-01
Abstract: L'invention concerne un module d'affichage. Le module d'affichage décrit comprend : un substrat; une pluralité de dispositifs électroluminescents montés sur la surface avant du substrat; un circuit intégré d'attaque monté sur la surface arrière du substrat; et une structure de dissipation de chaleur reliée à une couche de masse disposée à l'intérieur du substrat, comprenant un plot de masse exposé à la surface arrière du substrat, et dissipant la chaleur vers l'arrière du substrat.
Patent WO-2021172871-A1 (WO)
Inventor: HAH JUNG MI
IPC: C07D487/04
Filed: 2021-02-24
Abstract: The present invention relates to: a novel imidazole derivative compound; an isomer thereof or a pharmaceutically acceptable salt thereof; and a pharmaceutical composition comprising same. An imidazole derivative compound according to the present invention exhibits selective inhibitory activity against JNK, particularly JNK3, and thus can be used as a pharmaceutical composition for preventing and treating degenerative brain diseases (degenerative brain diseases including Alzheimer's dementia, and Parkinson's disease).
Patent WO-2021177762-A1 (WO)
Inventor: JEONG JI-WON
IPC: H01M50/24
Filed: 2021-03-04
Abstract: The present invention provides a battery rack which can effectively prevent fire or heat from spreading, and recycle an undamaged battery pack. In order to achieve the above purpose, a battery rack according to the present invention comprises: multiple battery packs vertically arranged, each of the battery packs comprising multiple secondary batteries stacked in one direction and a pack housing which has an internal space formed therein so as to receive the multiple secondary batteries and is configured to enable a fire extinguishing solution to be supplied to the inside thereof when the temperature therein rises up to a predetermined temperature or higher; and a rack case having a receiving space in which the multiple battery packs can be received, and including multiple shelf plates, each having a mounting surface on which the battery pack is mounted and which is inclined at a predetermined angle such that the height thereof gradually decreases toward one direction, and an extension part having an end portion toward the one direction, which protrudes further in the outer direction than the battery pack positioned below.
Patent WO-2021261749-A1 (WO)
Title: 슈즈 케어 장치 및 방법
Inventor: YOO HYUNSUN
IPC: A61L2/26
Filed: 2021-04-29
Abstract: 본 발명은 슈즈 케어 장치 및 방법에 관한 것이다. 이를 위해, 본 발명에 따른 슈즈 케어 장치는, 적어도 하나의 선반을 포함하는 선반부, 상기 적어도 하나의 선반의 스윙을 제어하는 모터부, 적어도 하나의 센서를 포함하는 센서부, 및 상기 모터부, 및 상기 센서부와 전기적으로 연결된 프로세서를 포함할 수 있다. 그리고, 상기 프로세서는 상기 적어도 하나의 센서를 이용하여 사용자의 접근을 식별하고, 상기 식별된 사용자의 접근에 기반하여, 상기 적어도 하나의 선반의 스윙을 조절하기 위한 제어 신호를 생성하여 상기 적어도 하나의 선반의 스윙을 조절할 수 있다. 따라서, 본 발명은 슈즈를 집중적으로 케어할 수 있거나, 또는 상시적으로 케어할 수 있다.
Patent WO-2021235915-A1 (WO)
Title: Liquid formulation
Inventor: MOON JI HYE
IPC: A61K9/08
Filed: 2021-05-24
Abstract: The present invention relates to: a liquid formulation of a long-acting conjugate of peptide having glucagon receptor and GLP-1 receptor activity; and a preparation method therefor.
Patent WO-2021242066-A1 (WO)
Title: Appareil et procédé de réalisation d'un codage par intelligence artificielle et d'un décodage par intelligence artificielle sur une image
Inventor: KIM JAEHWAN
IPC: H04N19/184
Filed: 2021-05-31
Abstract: L'invention concerne un appareil de décodage par intelligence artificielle (IA) comprenant au moins un processeur configuré pour exécuter une ou plusieurs instructions pour : obtenir une deuxième image correspondant à une première image en effectuant un premier décodage sur des données d'image incluses dans un flux binaire principal, obtenir des informations de fanion d'activation de l'augmentation de la résolution par IA incluses dans des données d'IA d'un flux binaire secondaire, déterminer s'il faut effectuer une augmentation de la résolution par IA sur la deuxième image, sur la base des informations de fanion d'activation de l'augmentation de la résolution par IA, lorsqu'il est déterminé qu'une augmentation de la résolution par IA doit être effectuée sur la deuxième image, obtenir une troisième image en effectuant une augmentation de la résolution par IA sur la deuxième image, par le biais d'un ensemble de réseaux neuronaux profonds (DNN) d' augmentation de la résolution conformément à des informations de DNN d'augmentation de la résolution, les informations de DNN d'augmentation de la résolution étant sélectionnées parmi une pluralité d'éléments d'informations de DNN d'augmentation de la résolution pré-stockées sur la base d'au moins une portion des données d'image et/ou d'au moins une portion des sous-données d'IA.
Patent WO-2022010153-A1 (WO)
Title: Method for improving wireless communication efficiency in electronic device, and apparatus therefor
Inventor: CHOI JUNSU
IPC: H04N21/414
Filed: 2021-06-29
Abstract: According to various embodiments, disclosed is an electronic device comprising: a display; a communication circuit; at least one sensor; a memory for storing instructions; and at least one processor electrically connected to the communication circuit, the at least one sensor, and the memory. The at least one processor may be configured to, when the stored instructions are executed, output a first image via the electronic device, receive, via the communication circuit, a frame defining a plurality of resource blocks capable of being independently decoded, from an external device connected to the electronic device via an assigned network, obtain status information of the electronic device by using the at least one sensor, decode image data corresponding to a first resource block corresponding to the obtained status information, from among the plurality of resource blocks, and output a second image via the electronic device, on the basis of the decoded image data.
Patent WO-2022045630-A1 (WO)
Title: Tête d'incorporation de fils multiples et appareil de fabrication de câble flexible l'utilisant
Inventor: SHIN MYOUNG GYU
IPC: H01B9/00
Filed: 2021-08-09
Abstract: La présente invention concerne : une tête d'incorporation de fils multiples dans laquelle une pluralité de fils peuvent être incorporés de manière dense dans un substrat présentant une petite surface, et pouvant ainsi être rendu compact ; et un appareil de fabrication de câble flexible l'utilisant. La tête d'incorporation de fils multiples comprend une tête qui incorpore, dans le substrat, des fils servant de conducteurs d'un câble flexible. La tête comprend : un corps de tête (422) présentant un orifice d'entrée (422a) à travers lequel un fil (200) est inséré ; et un orifice d'éjection (421a) pour éjecter, depuis l'intérieur du corps de tête (422), le fil (200) inséré à travers l'orifice d'entrée (422a).
Patent WO-2022075750-A1 (WO)
Title: 파우치 형 전지 케이스 및 그의 성형 장치, 파우치 형 이차 전지
Inventor: OH SE YOUNG
IPC: H01M50/116
Filed: 2021-10-06
Abstract: 상기 과제를 해결하기 위한 본 발명의 실시예에 따른 파우치 형 전지 케이스는 전극 및 분리막이 적층되어 형성되는 전극 조립체를 내부에 수용하는 컵부; 및 상기 컵부의 벽과 상기 벽으로부터 연장되는 사이드를 서로 연결하는 복수의 다이 엣지를 포함하되, 적어도 하나의 상기 다이 엣지는, 제1 곡률 반경으로 라운딩되어 형성되는 제1 영역; 및 상기 제1 곡률 반경보다 작은 제2 곡률 반경으로 라운딩되어 형성되는 제2 영역을 포함한다.
Patent WO-2023106447-A1 (WO)
Title: Nanosuspension containing progerinin, and preparation method therefor
Inventor: KIM MIN JU
IPC: A61K47/38
Filed: 2021-12-08
Abstract: The present invention relates to a nanosuspension formulation suitable for a progerinin drug, which is insoluble, and a preparation method therefor. Specifically, the progerinin nanosuspension according to the present invention is a vehicle composition for improving dispersive stability of a progerinin drug (a), which is insoluble, and employs hydroxypropylmethyl cellulose (HPMC)(b) or hydroxypropyl cellulose (HPC)(b'), TPGS(c) or sodium dioctyl succinate (DOSS)(c'), and potassium sorbate (d). A mixture thereof was subjected to wet-type ball milling in a Dyno-Mill chamber to prepare a white nanosuspension containing a progerinin drug with an average particle diameter of 100 nm to 300 nm. This nanosuspension exhibits uniform dispersibility of progerinin drug particles, minimal change in the size of drug particles even at low temperatures or severe environments, and excellent bioabsorption efficiency of the drug. Therefore, the nanosuspension containing progerinin according to the present invention can be widely used as an oral nanosuspension preparation to confirm the therapeutic effect of progeria.
Patent WO-2022131743-A1 (WO)
Inventor: PARK JEONGKEUN
IPC: C07D491/048
Filed: 2021-12-14
Abstract: 본 발명은 신규한 유기 발광 화합물 및 이를 이용한 유기 전계 발광 소자에 대한 것으로, 보다 상세하게는 열적 안정성, 전기화학적 안정성, 발광능, 자 수송능이 우수한 화합물 및 이를 하나 이상의 유기물층에 포함함으로써 발광효율, 구동 전압, 수명 등의 특성이 향상된 유기 전계 발광 소자에 대한 것이다.
Patent WO-2021242080-A1 (WO)
Inventor: LEE KWON-JIN
IPC: G07C9/30
Filed: 2021-05-26
Abstract: 선행 수검자의 보안검색 수검 중, 예외처리 상황이 발생하더라도 출입 통제 시스템의 선행 수검자의 보안검색 완료 시점을 정확히 검출할 수 있는 자동 출입 통제 시스템을 제공한다. 상기 자동 출입 통제 시스템은, 검색 수검자가 보안검색구역으로 진입하도록 출입문을 개방하는 검색 제어기, 보안 검색중 미리 설정되는 수검 예외 처리의 발생여부를 확인하기 위해 상기 검색 수검자를 1차 감지하여 1차 감지 신호를 생성하는 1차 센서, 미리 설정되는 검색 완료 조건의 만족여부를 판단하기 위해 2차 감지하여 2차 감지 신호를 생성하며, 상기 1차 센서와 감지 방식이 다른 2차 센서; 및 상기 수검 예외 처리가 발생하면 상기 1차 감지 및 2차 감지를 다시 진행하는 제어부를 포함하는 것을 특징으로 한다.
Patent WO-2022149885-A1 (WO)
Inventor: HAN HONGGOO
IPC: H01M10/653
Filed: 2022-01-06
Abstract: 본 발명의 일 실시예에 따른 전지 모듈은, 복수의 전지셀이 적층된 전지셀 적층체; 및 상기 전지셀들 사이에 위치하는 냉각핀을 포함한다. 상기 냉각핀은, 상기 전지셀들 중 하나와 대면하는 제1 부분 및 상기 전지셀들 중 다른 하나와 대면하는 제2 부분을 포함하고, 상기 제1 부분과 상기 제2 부분 사이에 공기층이 형성된다.
Patent WO-2022149967-A1 (WO)
Inventor: OH KWANG-KEUN
IPC: H01M10/6567
Filed: 2022-01-11
Abstract: A battery pack installed in a vehicle, according to an embodiment of the present invention, comprises: a plurality of battery cells; a base plate supporting the plurality of battery cells; and cross-beam units which are arranged to have a certain length along the width direction of the base plate, are arranged among the plurality of battery cells in the lengthwise direction of the base plate, and attach and fix the battery cells to each other, the battery cells facing each other in the lengthwise direction.
Patent WO-2022182129-A1 (WO)
Title: 안구 부위에 초음파 프로브를 밀착하기 위한 고정장치
Inventor: HONG JI MAN
IPC: A61B8/00
Filed: 2022-02-23
Abstract: 본 발명은 피검자의 머리에 착용되는 헤드셋과, 상기 헤드셋의 전방측에 고정되는 브라켓, 및 상기 브라켓의 하단에 구비되어, 초음파 프로브를 고정하는 프로브고정부재를 포함하고, 상기 브라켓은 피검자 눈의 높이에 대응하여 수직선상으로 이동하여 상기 프로브고정부재의 높이를 조절하는 높이조절바와, 상기 높이조절바의 하단에 일측이 회전 가능하게 구비되고, 피검자 눈의 깊이에 대응하여 회전하여 상기 프로브고정부재의 깊이를 조절하는 깊이조절바, 및 상기 깊이조절바의 타측에 회전 가능하게 구비되고, 피검자 눈 위치에 대응하여 회전하여 상기 프로브고정부재의 기울기를 조절하는 기울기조절바를 포함하여, 안구 부위에 위치되는 초음파 프로브를 고정하는 브라켓의 높이, 각도, 및 깊이를 선택적으로 가변할 수 있어, 피검자의 머리 모양이나, 안구 돌출상태에 따라 프로브의 위치를 대응하는 해당 위치에 위치할 수 있도록 하여, 프로브와 안구 부위의 밀착정도를 일정하게 유지시킬 수 있는 안구 부위에 초음파 프로브를 밀착하기 위한 고정장치를 제공한다.
Patent WO-2022197002-A1 (WO)
Title: Ionic organic framework for all-solid-state secondary battery, electrolyte including same, and all-solid-state secondary battery including same electrolyte
Inventor: KIM JONG-HO
IPC: H01M10/0565
Filed: 2022-03-08
Abstract: Provided is an ionic organic framework for an all-solid-state secondary battery, which has the structure of chemical formula (1) or chemical formula (2).