baber/WOPTO huggingface dataset:
Patent NO-336547-B1 (NO)
Title: Fremgangsmåte for å forbedre kjemikaliers virkning i vann
Inventor: LOTHE PER
IPC: C02F103/08
Filed: 2011-02-09
Abstract: Fremgangsmåte for å forbedre kjemikaliers virkning på levende organismer i vann, idet vannet strømmer i en strøm gjennom et behandlingsanlegg (1) hvor fremgangsmåten omfatter: - å tilføre et kjemikalie til vannet; - å utsette vannet for et undertrykk som bringer vannet til å koke ved den rådende vanntemperatur; - å la kjemikaliet virke på organismer som befinner seg i vannet i et fluid som omfatter vannet, inkludert fra vannet utløste gasser.
Patent NO-342752-B1 (NO)
Inventor: BREVIK ARNT-FRODE
IPC: E21B33/037
Filed: 2017-03-07
Abstract: The present invention relates to a protective structure for subsea installations located on a seabed, where the protective structure com prises a plurality of structural elements connected to each other to form a frame structure in the protective structure, where a plurality of protection covers are pivotally connected to the structural elements of the frame structure, and where the protective structure further com prises a torque transfer and/or lockdown arrangement for the protective covers.
Patent PL-101031-B1 (PL)
IPC: C07D213/55
Filed: 1972-05-12
Abstract: 6 beta-Acylamido-penam-3 alpha-carboxylic acids and their non-toxic derivs. in which the acylamido gp. has the structure R-C(=N ORa)-CO-NH- (where R is H or an org. gp. and Ra is an etherified monovalent org. gp. linked to the O-atom via a C-atom), the cpd. being present as the syn or anti isomer or as a mixt. of these isomers, partic. cpds. of formula (I): (where B is S or SO), have antibacterial activity against gram-positive organisms as well as Haemophilus influenzae. The syn isomers are active against penicillinase-producing Staphylococci and are resistant to various beta-lactamases.
[FR2137898A1]
Patent PL-156672-B1 (PL)
Title: Powder products containing explosive components,especially biologically active,showing a limited detonation liability and the method of their obtaining
IPC: C06B25/10
Filed: 1986-12-09
Abstract: The subject of the invention is the manufacturing method for products in a powdered form, containing explosive ingredients, in particular biologically-active and with a limited ability for detonation, used mainly in the pharmaceutical industry. The powdered products manufactured according to this invention, in spite of containing explosive ingredients in significant concentrations, either do not have ability to detonate or their detonation abilities are markedly reduced, much more than it would be expected from their contents.There are methods available for the reduction of detonating abilities by means of addition of plastifying agents for the explosive substance and by means of change of consistence of the explosive substance. There are methods available for example for an introduction of nitroglycerin into the powdered mixtures in the form of a water-based emulsion or in a solution with substances radically reducing its detonating abilities.Suddenly it was discovered that it is possible to obtain powdered products containing an explosive ingredient such as glycerine tri-nitrate, having its detonation abilities markedly reduced, as per this invention.The manufacturing method for products in a powdered form, containing explosive ingredients, in particular biologically-active and with a limited ability for detonation, is based on sprinkling of the explosive ingredient in the liquid form or in solution in a neutral organic or mineral matrix, optionally activated by an addition of a hydrophilic solvent, followed by a free static contact period for at least 8 hours at 18-25 degrees C, followed by homogenisation by means of known technologies. A useful neutral matrix can be lactose, calcium carbonate or colloidal silica with the specific surface of at least 2000 cm<2>/g.The mechanism of lowering the detonation sensitivity of the explosive ingredient according to this invention starts at the moment of contact with the neutral substance and proceeds with the speed
Patent PL-157106-B1 (PL)
Title: Fuel meter with correction for non-linearity of flow pick-ups
IPC: G01F9/02
Filed: 1988-01-08
Abstract: Fuel meter with correction for non-linearity of the flow sensors, having individual sensor measurement characteristic correctors and containing basic functional units, including a fuel consumption counter, a differential flow intensity counter, a measurement controller and a clock generator, characterized in that to the input terminals (WEQ) and (WET) of the sensor characteristic correctors (KOR1) and (KOR2) are fed, respectively, a pulse signal (Q) from the flow sensors and an analogue signal (T) from fuel temperature sensors, while input (WEQ) is connected to the input of a flow intensity decoder (DNP) and input (WET) is connected to the input of a temperature range decoder (DPT), and the parallel outputs of these decoders are connected to the address inputs of the memory (ROM) storing the correction coefficients, while the outputs of this memory are connected to the inputs of a fuel batch pulse decoder (DPP) and a frequency multiplier (MCZ); the outputs of the decoders (DPP) of both correctors are coupled to the signal inputs of the fuel consumption counter (LZP), the output of the decoder (DPP) of corrector (KOR1) being connected to the input of an inflow pulse divider (DID) and the output of the decoder (DPP) of corrector (KOR2) being connected to the input of an overflow pulse counter (LIP), while the outputs of the multipliers (MCZ) of both correctors are connected to the inputs of a signal branch point switch (ZWR), and in addition the output of the divider (DID) is connected in parallel to the input of a recording difference counter (LR) and the first input of a flip-flop circuit (RS), while the setting input of counter (LR) is has a multi-bit connection to the output.....<IMAGE>
Patent PL-156613-B1 (PL)
Title: Method of controlling coal by a coal mill feeding system
IPC: B65G19/04
Filed: 1988-06-03
Abstract: 1. A method of controlling coal flow in an equipment used to feed difficult-to-handle coal into mill, which consist of a rectangular coal bunker closed with at least two damper sections under which coal removing conveyors and a conveyor transporting the coal to the boiler mills characterised in that the thickness of the coal layer on the coal removing conveyor (12, 13) belts is regulated with one coal gate (3) built between two damper sections (4, 5 and 6, 7), which close the coal bunker (1, 2) outlets, whereas free flow of coal from coal removing conveyor (12, 13) to the transporting conveyor (14) is ensured by rotating flaps (8, 9, 10, 11) mounted in the side walls of the machine and deflected alternately depending on the transport direction of the coal removing conveyor (12, 13) belts synchronised also with opening rate of one damper section (4, 5 and 6, 7) that close the coal bunker (1, 2) outlets.<IMAGE>
Patent PL-156626-B1 (PL)
Title: Ram store testing apparatus
IPC: G11C29/00
Filed: 1988-06-27
Abstract: RAM testing device, characterized in that it consists of a memory selector (1) connected to the first input of a RAM, and of a control circuit (2) with four outputs, of which one is connected via an address counter (3) to an address bus (7), the second is connected directly to the RAM, the third is connected to the input of an expander (4), and the fourth is connected to a set of indicators (6), while the output of the RAM is connected by a data bus (8) via an expander (4) and then a coincidence circuit (5) to the second input of the control circuit (2), whose first input is the input for the system as a whole, and in addition the output of the address counter (3) is connected to the second input of the coincidence circuit (5).<IMAGE>
Patent PL-158152-B1 (PL)
Title: Sport foot-wear in particular for skiing contests
IPC: A43B5/04
Filed: 1988-11-09
Abstract: A cross-country ski shoe has a high outer shaft and a low inner shaft. The inner shaft has a lacing device for retaining the foot. The outer shaft is closed by a covering tongue. The lacing system (10) of the inner shaft (3) also acts on the outer shaft (2) preferably in a region of flexure of the ankle.
Patent PL-161588-B1 (PL)
Inventor: GRICKOWA INNESA
IPC: A61K47/30
Filed: 1990-02-01
Abstract: 1. S p o só b o trz y m y w a n ia m ik ro s fe r p o lis ty re n o w y c h o w ą s k im ro z rz u c ie w ie lk o ś c i cząstek
na d ro d z e p o lim e ry z a c ji e m u ls y jn e j s ty re n u w o b e c e m u lg a to ra i in ic ja to ra p o lim e ry z a c ji, znam
ie n n y ty m , że p ro ce s p ro w a d z i się w k o p o lim e ry z a c ji s tyre n u z b e z w o d n ik ie m m a le in o w y m
w z ię ty m w ilo ś c i 0 ,1 -1 % w a g o w y c h w s to s u n k u d o s ty re n u o ra z w o b e cności n a d s ia rc z a n u
p o ta s u ja k o in ic ja to ra i n ie jo n o w e g o e m u lg a to ra , k tó r y m są o k s y e ty le n o w a n e p o lip ro p y le n o g lik
o le o m asie c zą ste czko w e j 6-11 X 103 i s to p n iu o k s y e ty le n o w a n ia 6 0 -8 0 % lu b a lk o h o l c e ty lo w y
o k s y e ty le n o w a n y d w u d z ie s to m a m o la m i tle n k u e ty le n u , p rz y czym stężenie in ic ja to ra i e m u lg a ­
to ra w y n o s i 0 ,1 -1 ,0 % w s to s u n k u d o s ty re n u .
Patent PL-165578-B1 (PL)
Title: Self-cleaning agent for sanitary appliances
Inventor: MURAWSKI ROMAN
IPC: C11D7/36
Filed: 1991-07-08
Abstract: Self cleaning compound for washing sanitary equipment containing the complex phosphoric acids with urea, organic acids and alkali metals sulphates, characterised in that it contains 15-80% by weight of the complex phosphoric acids compounds with urea, 0.1-4.0% by weight of alkylphenol oxyethylated with alkylphenol ethylene oxide, 0.1-8.0% by weight of alkylbenzenesulfonic acid, 1.0-40.0% by weight of citric acid, and/or fumaric acid, and/or maleic acid and/or oxalic acid, and/or formic acid, or mixture of those acids, 0.1-30% by weight of inorganic salts of alkali metals with sulphuric acid, 0.01-1.0% by weight of colouring, 0.1-0.5% by weight of fragrance compounds and water.
Patent PL-168577-B1 (PL)
Title: Continuous copper smelting apparatus
Inventor: GOTO MOTO
IPC: C22B15/06
Filed: 1991-11-19
Abstract: The invention relates to an apparatus for smelting copper which includes a smelting furnace (1), a separating furnace (2), a converting furnace (3), and launders (7A; 7B) connecting these furnaces in series. In the smelting furnace (1), copper concentrate is melted and oxidized to produce matte and slag. In the separating furnace (2), the matte is separated from the slag. In the converting furnace (3), the matte separated from the slag is oxidized to produce blister copper. A plurality of anode furnaces (4) are provided for refining the blister copper produced in the converting furnace (3) into copper of higher quality. A blister copper launder assembly (11), which has a main launder (11A) and a plurality of branch launders (11B) branched off from the main launder (11A), is provided to connect the converting furnace (3) and the anode furnaces (4) together. A selecting device (12) may be attached to the launder assembly (11) for selectively bringing the main launder (11A) into fluid communication with one of the branch launders (11B). <IMAGE>
Patent PL-171954-B1 (PL)
Title: Novel herbicide
Inventor: CAIN PAUL A
IPC: A01N43/80
Filed: 1993-02-04
Abstract: 4-Benzoylisoxazole derivative of general formula (I): <CHEM>  wherein: R<1> represents an alkyl group or an optionally substituted cycloalkyl group R<2> represents a halogen atom, or a group selected from R<5>, -OR<5>, -S(O)mR<5>, -O(CH2)q-OR<5>, -CO2R<5> and nitro; R<3> represents a halogen atom, or a group selected from R<5>, -OR<5>, -S(O)mR<5> and -O(CH2)q-OR<5>; R<4> represents a hydrogen or halogen atom, or a group selected from R<5>, -OR<5>, -S(O)mR<5>, -O(CH2)q-OR<5> and nitro; with the proviso that at least one of the groups R<2>, R<3> and R<4> represents -O(CH2)q-OR<5>; R<5> represents a straight- or branched- chain alkyl group containing from one to four carbon atoms optionally substituted by one or more halogen atoms;     m represents zero, one or two; and     q represents an integer from one to three;. and their use as herbicides is described.
Patent PL-170101-B1 (PL)
Inventor: GLUCH PIOTR
IPC: E21D11/08
Filed: 1993-04-19
Abstract: 1. Obudowa dla wyrobisk korytarzowych wykonana w części stropowo-ociosowej z odrzwi stalowych, a w spągowej z prefabrykatów betonowych, znamienna tym, że ma zastabilizowane podciągami stalowymi (2) łuki ociosowe pod którymi ma założone prefabrykaty węzgłowiowe (3) oparte o koniec łuku ociosowego odrzwi obudowy stalowej (1), a prefabrykat węzgłowiowy powiązany jest materiałem wiążącym (5) z górotworem i prefabrykowanym łukiem spągowym (4), przy czym boczne powierzchnie prefabrykatów węzgłowiowych (3) są ograniczone płaszczyzną spągu, ociosu, podciągu stalowego (2) oraz prefabrykatów spągowych.
Patent PL-172801-B1 (PL)
Title: Method of obtaining rigid foamed plastics containing urethane groups and excess of isocyanuric groups
Inventor: WIEDERMANN ROLF
IPC: C08J9/14
Filed: 1993-07-09
Abstract: Rigid foams containing urethane groups and predominantly isocyanurate groups are obtained by reaction of 1) polyisocyanates with 2) compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of 400 to 10,000 in the presence of 3) organic blowing agents and 4) flameproofing agents and 5) compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of 32 to 399 as crosslinking agent and optionally in the presence of 6) auxiliaries and additives known per se, using a process in which component 2) has branched chains; component 2), the flameproofing agent 4) and the crosslinking component 5) are used as a formulation in which component 2) is present in a quantity of 30 to 90 parts by weight, component 4) is present in a quantity of 10 to 60 parts by weight and component 5) is present in a quantity of 10 to 20 parts by weight, the parts by weight of these components adding up to 100, and the reaction is carried out in an index range of 200 to 600.
Patent PL-172889-B1 (PL)
Inventor: MACHOWSKI JOZEF
IPC: G01R31/02
Filed: 1994-04-29
Abstract: 1. Układ do kontroli ciągłości żyły ochronnej przewodu czterozyłowego
zawierający generator napięcia pomiarowego połączony
z układem sprzęgającym, którego wyjście jest połączone z co najmniej
jedną żyłą kontrolowanego odcinka przewodu oraz czujnik
sygnału pomiarowego sprzężony z badanążyłąochronną 1 połączony
równocześniez układempomiarowym, znamiennytym, że wyjście
układu sprzęgającego(2)jestpołączonez żyłamiroboczymi(3)
kontrolowanego odcinka przewodu od strony źródłazasilania (Tr),
które od strony zasilanego odbiornika (4) są połączone z drugim
układem sprzęgającym (5), a drugi układ sprzęgający (5) poprzez
metalową osłonę odbiornika (4) jest połączony z jednym końcem
żyły ochronnej (6), której drugi koniecjestuziemiony, przy czym z
żyłąochronną(6) od strony źródłazasilania (Tr)jestpołączony także
generator napięciapomiarowego (1), ponadtojako czujnik sygnału
pomiarowego stosuje się pomiarowy czujnik bezstykowy (7),
któryjestsprzężony zżyłąochronną(6)wpobliżugeneratoranapięcia
pomiarowego (1) pomiędzy punktem wspólnymżyły ochronnej
(6) i generatora napięcia pomiarowego (1) a punktem wspólnym
żyły ochronnej (6) i metalowej osłony odbiornika(4),równocześnie
czujnik bezstykowy (7) poprzez układ pomiarowy (8)jest połączony
z łącznikiem (9), włączonym pomiędzy źródło zasilania (1) a
kontrolowany odcinek przewodu zasilającego odbiornik (4)
Patent PL-172532-B1 (PL)
Title: Method of obtaining novel substituted derivatives of imidazole and their pharmaceutically admissible additive salts formed with acids
Inventor: KARJALAINEN ARTO J
IPC: C07D/
Filed: 1992-12-18
Abstract: PCT No. PCT/FI92/00349 Sec. 371 Date Sep. 19, 1994 Sec. 102(e) Date Sep. 19, 1994 PCT Filed Dec. 18, 1992 PCT Pub. No. WO93/13074 PCT Pub. Date Jul. 8, 1993.The invention provides compounds of the formula    <IMAGE>  I  wherein Y is -CH2- or -CO-; R1 is F, Cl or OH; R2 is H, F or Cl; and R3 is H, CH3 or CH2CH3, excluding 4-(5-chloro-2,3-dihydro-1H-inden-2-yl)-1H-imidazole and 4-(4-chloro-2,3-dihydro-1H-inden-2-yl)-1H-imidazole; and their non-toxic acid addition salts and mixtures thereof. Processes for the preparation of these compounds are described, as are pharmaceutical compositions comprising at least one of the compounds or its salt. The compounds and their non-toxic salts exhibit valuable pharmacological activity and are highly selective and long acting antagonists at  alpha 2-adrenoceptors. Their peroral bioavailability is good. The compounds are especially useful in the treatment of cognitive disorders.
Patent PL-178552-B1 (PL)
Title: Silica-sodium-calcium glass compositions
Inventor: JEANVOINE PIERRE
IPC: B32B17/10
Filed: 1994-09-16
Abstract: Glass compositions suitable for the production of glass panes, capable especially of being employed in the architectural field or fitted to self-propelled and industrial vehicles. The glass composition according to the present invention includes, expressed in percentages by weight, from 0.75 to 1.4 % of total iron expressed in the form of Fe2O3, from 0.25 to 0.32 % of ferrous iron in the form of FeO and exhibits, under a thickness of between approximately 3 and 3.3 millimetres, an overall luminous transmission factor under illuminant A (TLA) of at least 70 %, an overall energy transmission factor (TE) lower than approximately 46 % and an ultraviolet radiation transmission factor lower than approximately 25 %.
Patent PL-175101-B1 (PL)
Inventor: PAWLAK GRZEGORZ
IPC: H02H11/00
Filed: 1994-10-21
Abstract: Układ zabezpieczający urządzenia elektroniczne
przed używaniem przez osoby nieuprawnione,
umieszczony wewnątrz obudowy urządzenia
elektronicznego, zawierający nadajnik
kodu w postaci "pilota" na podczerwień, układ
rozkodowująco-sterujący do wejść, do którego
dołączony jest odbiornik kodu oraz czujniki wykrywające
stan otwarcia lub zamknięcia obudowy
chronionego urządzenia, wyjścia układu rozkodowująco-sterującego
sterują przekaźnikiem włączającym
napięcie zasilania chronionego urządzenia
oraz przetwornicą wytwarzającą wysokie napięcie,
znamienny tym, że wyjście przetwornicy wysokiego
napięcia (6) jest podłączone do linii zasilania
(Uw) chronionego urządzenia (8).
Patent PL-172271-B1 (PL)
Title: Apparatus for continuously producing poyurethane foam in the form of blocks
Inventor: BLACKWELL BRIAN J
IPC: B29C44/48
Filed: 1992-06-01
Abstract: 1. A device for continuous production of polyurethane foam in the form of blocks consists of conveyors, a mixing head and such elements as the trough for carrying the regulating mixture onto the conveyors and conveyor driving assembly. Characterized in that it has also the starting board (7) connected by means of the connecting arm (9) to the carriage (10). The latter moves along the track (11), which runs along at least the part of the mentioned conveyor (1), which is located in the vicinity of the disposing means (6), such as a trough. The engine (12) is connected to the starting board (7) and drives it along the conveyor (1). The device is also equipped with such devices (15) as a mechanical or hydraulic system for lifting and pushing the starting board home, and with the ending board (8). The latter is connected by means of the connecting arm (25, 26) to the carriage (23, 24), which moves along the track (27, 28). The latter runs along at least a part of the mentioned conveyor (1). The device is also equipped with the engine (29), connected to the ending board (8).
Patent PL-176358-B1 (PL)
Title: Anchoring bolt and method of making same
Inventor: HAAGE MANFRED
IPC: B22F5/00
Filed: 1995-01-30
Abstract: The masonry fitting bolt has a pattern a protrusions (5) spaced over its outer shaft in an area which is to be inside the bored hole. The protrusions are spaced and orientated in such a way that the insertion of the bolt provides an even mixing of the bonding material which is introduced into the bore to cement the bolt into place. The protrusions are produced on the bolt by metal power moulding of the protrusions and the bolt. The protrusions are shaped to provide a cutting edge to clean the bore prior to fitting and have an offset array to provide a good grip and a good mixing effect. The leading end of each protrusion can be pointed for ease of insertion.
Patent PL-176137-B1 (PL)
Inventor: TYTYK EDWIN
IPC: F16L55/033
Filed: 1995-03-24
Abstract: 1. Tłumik hałasu w ciągu redukcyjnym gazu, zawierający
korpus, którego wewnętrzna ścianka bocznawyłożonajest materiałem
tłumiącym dźwiękochłonnym, usytuowanym pomiędzyjej powierzchnią
i perforowaną wewnętrzną ścianką tłumiącą, otaczającą
właściwy zespół tłumiący z elementami rozdziału strumieni gazu,
znamienny tym, ze stanowi odrębne urządzenie wyposażone we
wlot (4) i wylot (5), zaś korpus wyłożony materiałem tłumiącym
dźwięko- chłonnym (2) i perforowaną wewnętrzną ścianką tłumiącą
(3) stanowijego obudowa (1), natomiast zespół tłumiący zawiera
kilkustopniowy zestawelementówtłumiących (10),(11), usytuowanych
w przybliżeniu w osi obudowy (1), z których każdy element
tłumiący (11) następnego stopnia otacza całkowicie przestrzeń wokół
ścianek elementu tłumiącego (10) poprzedniego stopnia, przy
czym każdy element tłumiący (10), (11) ma postać tunelu z kształtową,
korzystnie walcową pobocznicą, wokół osi obudowy (1),
zamkniętego od strony przeciwnej wlotowi (4) gazu ścianką czołową
(6), a krawędź obwodowa jego pobocznicy osadzona jest w
pokrywie czołowej wokół wlotu (4) gazu do wnętrza obudowy (1)
tłumika, jednocześnie ścianki każdego elementu tłumiącego (10),
(11) mają otwory przelotowe (12), stanowiące elementy rozdziału
strumieni gazu.
Patent PL-174167-B1 (PL)
Title: Electrolytic cell and electrode therefor
Inventor: WOOLHOUSE ROBIN A
IPC: C25B9/19
Filed: 1993-10-28
Abstract: PCT No. PCT/GB93/02221 Sec. 371 Date May 16, 1995 Sec. 102(e) Date May 16, 1995 PCT Filed Oct. 28, 1993 PCT Pub. No. WO94/12692 PCT Pub. Date Jun. 9, 1994An electrode comprising a first plate (4) having an active electrode surface and a second plate (14) facing and spaced from the first plate, and at least one barrier plate (13) positioned between the first and second plates and spaced from the active electrode surface of the first plate and from the facing surface of the second plate. An electrolytic cell comprising such an electrode and the use thereof in the electrolysis of aqueous alkali metal chlorides.
Patent PL-178850-B1 (PL)
Inventor: BARDONSKI BERNARD
IPC: B65H29/18
Filed: 1995-11-14
Abstract: Zespół oporowy urządzenia do obróbki ułożonych w stos płyt prostokątnych z tektury lub podobnego materiału, umieszczony w przedniej części stołu pomiędzy nim a rolkami podającymi, znamienny tym, że zbudowany jest z zespołu (5) dwóch listew (8, 9) równoległych o regulowanym ustawieniu (S1, S2) względem stołu (2), gdzie prześwit (SI) pomiędzy pierwszą listwą(8) a stołem (2) jest większy od prześwi- ffl tu (S2) pomiędzy drugą listwą (9) a stołem (2), przy czym pomiędzy listwami (8,9) umieszczony jest ruchomy element dociskowy (12,15), dla gg obrabianych płyt (11).
Patent PL-177081-B1 (PL)
Title: Water conditioning and soil reclaiming preparation
Inventor: WILLUWEIT THOMAS
IPC: B09C1/00
Filed: 1994-12-27
Abstract: A composition for treatment of water and soils comprises componentsA. CaCO3,B. at least one compound selected from the group consisting of calcium salts, including CaCl2 and Ca(NO3)2, and inorganic magnesium compounds,C. at least one compound selected from the group consisting of NaHCO3 and KHCO3,wherein the components A and B are present in a molar ratio of from 0.1:1 to 1:1, and wherein the components B and C are present in a molar ratio of from 1:3 to 1:1.
Patent PL-181907-B1 (PL)
Inventor: OBARA ROBERT
IPC: C07D317/12
Filed: 1996-09-26
Abstract: 1. Nowe cykliczne acetale, o ogólnym
wzorze 1 przedstawionym na rysunku,
w którym R'iR2sąatomami wodoru albo
R1 jest grupąmetylową, a R2 atomem wodoru,
albo Rljest grupą etylową, a R2 jest atomem
wodoru, albo Rijest grupą t-butylową,
a R2 jest atomem wodoru, albo zarówno Ri
jak i R2 są grupami metylowymi.