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Heterocyclic Compounds

Heterocyclic compounds are a class of compounds that consist of carbon atoms and non-carbon atoms altogether forming a cyclic skeletal structure. These non-carbon atoms are collectively referred to as a heteroatom. The common heteroatoms include nitrogen, oxygen, and sulfur. Lactones, lactams, cyclic ethers that we’ve already learned are heterocyclic compounds. With similar properties of congeneric open-chain compounds, they will be discussed in corresponding chapters. This chapter will mainly discuss heterocyclic compounds with relatively stable ring system and with a certain degree of aromaticity, also known as aromatic heterocyclic compound.

There are many kinds and a large number of heterocyclic compounds widely distributed in nature. Many natural heterocyclic compounds in animals and plants play an important physiological role in the body. For example, heterocyclic structure exists in chlorophyll in plants, hemoglobin in animal blood, alkaloids and glycosides as the active ingredient in herbs, some antibiotics and vitamins, certain composition of amino acids in protein and bases in nucleotide. About half of the existing medicines have heterocyclic structures. Thus, heterocyclic compounds play an important role in organic compounds especially in organic medicines.

The most common and also the most important heterocyclic compounds are that with five-membered or six-membered heterocyclic ring and their fused heterocyclic compounds. Therefore, according to the size of the ring, heterocyclic compounds can be divided into five-membered compounds and six-membered heterocyclic compounds. E.g., furan, thiophene, pyrrole, imidazole, triazole and their fused heterocyclic compounds, indole, benzimidazole and diphenylene-oxide are all five-membered heterocyclic compounds, while pyridine, pyrimidine and their fused heterocyclic compounds, quinoline and quinazoline are all six-membered heterocyclic compounds.

According to the number of hetero atoms, five-membered compounds and six-membered heterocyclic compounds can be divided into one-hetero-atom-containing heterocyclic compounds and two-hetero-atom-containing and several-hetero-atom-containing heterocyclic compounds. E.g., furan, thiophene, pyridine, indole, quinoline, dibenzofuran, etc. are one-hetero-atom-containing heterocyclic compounds; imidazole, pyrimidine, benzimidazole, quinazoline, etc. are two-hetero-atom-containing heterocyclic compounds; purine, comprising more than two hetero atoms, is a several-hetero-atom-containing heterocyclic compound. According to the form of the ring in the molecule, heterocyclic compounds can be divided into single-heterocyclic compounds and fused heterocyclic compounds. E.g., furan, pyridine, pyrimidine, imidazole, etc. are single-heterocyclic compounds and indole, quinoline, dibenzofuran, purines, etc. are fused heterocyclic compounds.

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Structure Chemical Name CAS MF
(3S,5R)-5-Methylpyrrolidin-3-ol (3S,5R)-5-Methylpyrrolidin-3-ol 1108234-25-8 C5H11NO
7-(TrifluoroMethyl)iMidazo[1,2-a]pyridine-2-carboxylic acid 7-(TrifluoroMethyl)iMidazo[1,2-a]pyridine-2-carboxylic acid 1620569-19-8 C9H5F3N2O2
6-aMino-3-Methyl-1-(ethyl)-1,2,3,4-tetrahydropyriMidine-2,4-dione 6-aMino-3-Methyl-1-(ethyl)-1,2,3,4-tetrahydropyriMidine-2,4-dione 41862-13-9 C7H11N3O2
4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-2-M-tolylpyridine 4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-2-M-tolylpyridine 1402172-13-7 C18H22BNO2
3-broMo-5-(trifluoroMethoxy)pyridine 3-broMo-5-(trifluoroMethoxy)pyridine 1060815-01-1 C6H3BrF3NO
1,2-PROPANEDIOL, 3-(2-NITRO-1H-IMIDAZOL-1-YL)- 1,2-PROPANEDIOL, 3-(2-NITRO-1H-IMIDAZOL-1-YL)- 13551-92-3 C6H9N3O4
6-Chloro-2-Methylpyrido[3,4-d]pyriMidin-4(1H)-one 6-Chloro-2-Methylpyrido[3,4-d]pyriMidin-4(1H)-one 1637671-24-9 C8H6ClN3O
2-(2-bromophenyl)-4,6-diphenyl-1,3,5-triazine 2-(2-bromophenyl)-4,6-diphenyl-1,3,5-triazine 77989-15-2 C21H14BrN3
1-(3-Methoxyphenyl)piperazine dihydrochloride 1-(3-Methoxyphenyl)piperazine dihydrochloride 6968-76-9 C11H17ClN2O
(S)-8-chloro-2-(trifluoromethyl)-3,4-dihydro-1H-pyrimido[1,2-a]pyrimidin-6(2H)-one (S)-8-chloro-2-(trifluoromethyl)-3,4-dihydro-1H-pyrimido[1,2-a]pyrimidin-6(2H)-one 1260585-11-2 C8H7ClF3N3O
4-bromo-6-(4-methylpiperazin-1-yl)pyrimidine 4-bromo-6-(4-methylpiperazin-1-yl)pyrimidine 1209458-43-4 C9H13BrN4
(2S,4R)-4-Chloro-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester (2S,4R)-4-Chloro-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester 317356-97-1 C11H18ClNO4
6-(1H-Pyridin-2-one)-2-bromopyridine 6-(1H-Pyridin-2-one)-2-bromopyridine 959237-86-6 C10H7BrN2O
2-Fluoro-2'-Bromobiphenyl 2-Fluoro-2'-Bromobiphenyl 1554-05-8 C12H8BrF
2-AMINO-7-CHLORO-5-OXO-5H-(1)BENZOPYRANO-(2,3-B)-PYRIDINE-3-CARBONITRILE 2-AMINO-7-CHLORO-5-OXO-5H-(1)BENZOPYRANO-(2,3-B)-PYRIDINE-3-CARBONITRILE 1033202-10-6 C7H4ClFN2
1,3-bis(4-carboxyphenyl)imidazoliumchloride 1,3-bis(4-carboxyphenyl)imidazoliumchloride 1414629-40-5 C17H13ClN2O4
4-OXO-3,4-DIHYDROTHIENO[3,2-D]PYRIMIDINE-7-CARBOXYLIC ACID 4-OXO-3,4-DIHYDROTHIENO[3,2-D]PYRIMIDINE-7-CARBOXYLIC ACID 1527518-33-7 C7H4N2O3S
2-amino-5-nitro-4,6-dimethylpyridine 2-amino-5-nitro-4,6-dimethylpyridine 22934-22-1 C7H9N3O2
5-Bromo-2-cyclobutoxypyridine 5-Bromo-2-cyclobutoxypyridine 1159816-70-2 C9H10BrNO
7-chloro-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine 7-chloro-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine 99951-68-5 C6H6ClN5
1-phenyl-1H-imidazo[4,5-c]pyridine 1-phenyl-1H-imidazo[4,5-c]pyridine 61532-35-2 C12H9N3
2-cyclopropylthiazole 2-cyclopropylthiazole 1159821-56-3 C6H7NS
5-bromo-4-(4-methoxyphenyl)-2-Thiazolamine 5-bromo-4-(4-methoxyphenyl)-2-Thiazolamine 98946-76-0 C10H9BrN2OS
Thiophene, 2-(3-bromophenyl)-
Thiophene, 2-(3-bromophenyl)- 145493-75-0 C10H7BrS
5-(cyclohexyloxy)-2-Pyridinamine 5-(cyclohexyloxy)-2-Pyridinamine 1019582-87-6 C11H16N2O
2-bromo-6-(1H-pyrazol-4-yl)pyridine 2-bromo-6-(1H-pyrazol-4-yl)pyridine 1093879-85-6 C8H6BrN3
5-bromo-2-tert-butylpyridin-4-amine 5-bromo-2-tert-butylpyridin-4-amine 1352329-34-0 C9H13BrN2
1-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)pyrrolidin-2-one 1-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)pyrrolidin-2-one 1352645-48-7 C15H21BN2O3
2-(thiazol-2-yl)thiazole 2-(thiazol-2-yl)thiazole 13816-21-2 C6H4N2S2
5-(2-thiazolyl)-2-Pyridinamine 5-(2-thiazolyl)-2-Pyridinamine 1177269-11-2 C8H7N3S
5-(4-methoxyphenyl)-3-Pyridinol 5-(4-methoxyphenyl)-3-Pyridinol 1258609-27-6 C12H11NO2
5-(tetrahydro-2H-pyran-4-yl)pyridin-3-amine 5-(tetrahydro-2H-pyran-4-yl)pyridin-3-amine 1259442-70-0 C10H14N2O
2-(4-fluorophenyl)-5-pyrimidinol 2-(4-fluorophenyl)-5-pyrimidinol 1260862-66-5 C10H7FN2O
N-Hydroxy-N'-[5-(2-methyl-2-propanyl)-1H-pyrazol-3-yl]-4-nitroben zenecarboximidamide N-Hydroxy-N'-[5-(2-methyl-2-propanyl)-1H-pyrazol-3-yl]-4-nitroben zenecarboximidamide 152828-23-4 C14H17N5O3
dimethyl(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)phosphine oxide dimethyl(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)phosphine oxide 1394346-20-3 C14H22BO3P
4-Morpholinobenzaldehyde 4-Morpholinobenzaldehyde 1204-86-0 C11H13NO2
7-Iodo-2',3'-Dideoxy-7-Deaza-Guanosine 7-Iodo-2',3'-Dideoxy-7-Deaza-Guanosine 114748-67-3 C11H13IN4O3
2-Chloro-4-(1H-Pyrazol-5-Yl)Benzonitrile 2-Chloro-4-(1H-Pyrazol-5-Yl)Benzonitrile 1297537-37-1 C10H6ClN3
DE-7 DE-7 681490-93-7 C7H8ClN3O3
5-Cyclopentylpyridine-3-boronic acid pinacol ester 5-Cyclopentylpyridine-3-boronic acid pinacol ester 2096342-36-6 C16H24BNO2
2-Bromo-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyrazine 2-Bromo-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyrazine 1260663-45-3 C5H7BrN4
(2S,3S,4R)-1-tert-butyl 2-methyl 4-((3-(1,1-difluorobut-3-en-1-yl)-7-methoxyquinoxalin-2 -yl)oxy)-3-ethylpyrrolidine-1,2-dicarboxylat (2S,3S,4R)-1-tert-butyl 2-methyl 4-((3-(1,1-difluorobut-3-en-1-yl)-7-methoxyquinoxalin-2 -yl)oxy)-3-ethylpyrrolidine-1,2-dicarboxylat C26H33F2N3O6
2,5,7-Triazaspiro[3.4]octane-6,8-dione hydrochloride 2,5,7-Triazaspiro[3.4]octane-6,8-dione hydrochloride 1026796-27-9 C5H8ClN3O2
benzo[1,2-c:3,4-c']bis([1,2,5]thiadiazole) benzo[1,2-c:3,4-c']bis([1,2,5]thiadiazole) 211-16-5 C6H2N4S2
3-(Piperidin-1-yl)pyridin-2-amine 3-(Piperidin-1-yl)pyridin-2-amine 1286273-41-3 C10H15N3
6-(Pyrrolidin-1-yl)pyridin-2-amine 6-(Pyrrolidin-1-yl)pyridin-2-amine 883987-27-7 C9H13N3
1H-Imidazol-2-amine,1-[(6-chloro-3-pyridinyl)methyl]-4,5-dihydro-N-nitroso- 1H-Imidazol-2-amine,1-[(6-chloro-3-pyridinyl)methyl]-4,5-dihydro-N-nitroso- 131206-85-4 C9H10ClN5O
2,4(1H,3H)-Pyrimidinedione,1-propyl- 2,4(1H,3H)-Pyrimidinedione,1-propyl- 24466-52-2 C7H10N2O2
5H-Cyclopenta[c]pyridine-5,7(6H)-dione 5H-Cyclopenta[c]pyridine-5,7(6H)-dione 5807-19-2 C8H5NO2
3-(4-TOLYL)PYRAZOLE 3-(4-TOLYL)PYRAZOLE 59843-75-3 C10H10N2
Butanedihydrazide Butanedihydrazide 4146-43-4 C4H10N4O2
4-(4-Fluorobenzoyl)piperidine hydrochloride 4-(4-Fluorobenzoyl)piperidine hydrochloride 25519-78-2 C12H15ClFNO
4-CYCLOPROPYL-1,3-THIAZOL-5-AMINE 4-CYCLOPROPYL-1,3-THIAZOL-5-AMINE 1249588-40-6 C6H8N2S
6-chloro-3-methyl-2-(trifluoromethyl)pyridine 6-chloro-3-methyl-2-(trifluoromethyl)pyridine 1360967-57-2 C7H5ClF3N
5,6-Dibromo-1H-benzotriazole 5,6-Dibromo-1H-benzotriazole 716320-92-2 C6H3Br2N3
2,4-Dibromo-5-(trifluoromethyl)pyridine 2,4-Dibromo-5-(trifluoromethyl)pyridine 1227587-50-9 C6H2Br2F3N
6-(Bromomethyl)imidazo[2,1-b]-[1,3]thiazole hydrobromide 6-(Bromomethyl)imidazo[2,1-b]-[1,3]thiazole hydrobromide 330196-49-1 C6H6Br2N2S
1-(6-Bromopyridin-3-yl)-4-methylpiperazine 1-(6-Bromopyridin-3-yl)-4-methylpiperazine 879488-53-6 C10H14BrN3
4-chloro-6-cyclohexyl-2-methylpyrimidine 4-chloro-6-cyclohexyl-2-methylpyrimidine 1412957-40-4 C11H15ClN2
4-bromo-3-methyl-1,2-dihydropyridin-2-one 4-bromo-3-methyl-1,2-dihydropyridin-2-one 1227578-99-5 C6H6BrNO
tert-butyl cis-3-fluoro-4-hydroxypyrrolidine-1-carboxylate tert-butyl cis-3-fluoro-4-hydroxypyrrolidine-1-carboxylate 2055223-76-0 C9H16FNO3
1-Butyl-1-methylpyrrolidinium Bis(fluorosulfonyl)imide 1-Butyl-1-methylpyrrolidinium Bis(fluorosulfonyl)imide 1057745-51-3 C9H20F2N2O4S2
6,11-dibromo-1,4-diazatriphenylene 6,11-dibromo-1,4-diazatriphenylene 1012836-59-7 C16H8Br2N2
3-Isopropylpyridin-4-amine 3-Isopropylpyridin-4-amine 90196-88-6 C8H12N2
21H,23H-Porphine,5,10,15,20-tetra-1H-pyrazol-4-yl- 21H,23H-Porphine,5,10,15,20-tetra-1H-pyrazol-4-yl- 1849676-26-1 C32H22N12
(6-(sec-butyl)pyridin-3-yl)boronic acid (6-(sec-butyl)pyridin-3-yl)boronic acid 2225151-77-7 C9H14BNO2
1-methyl-4-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-4-yl)piperazine 1-methyl-4-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-4-yl)piperazine 1402174-19-9 C16H26BN3O2
2-(1H-pyrrol-1-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-(1H-pyrrol-1-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1212021-65-2 C15H19BN2O2
2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(3-(trifluoromethyl)phenyl)pyridine 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(3-(trifluoromethyl)phenyl)pyridine 2223037-87-2 C18H19BF3NO2
2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(thiophen-2-yl)pyridine 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(thiophen-2-yl)pyridine 1402240-62-3 C15H18BNO2S
2-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)thiazole 2-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)thiazole 2223049-11-2 C14H17BN2O2S
2-(tetrahydro-2H-pyran-2-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-(tetrahydro-2H-pyran-2-yl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223009-71-8 C16H24BNO3
3-(tetrahydro-2H-pyran-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 3-(tetrahydro-2H-pyran-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223009-54-7 C16H24BNO3
4-(2-methylpiperidin-1-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 4-(2-methylpiperidin-1-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1352297-97-2 C17H27BN2O2
4-(3-methyl-1H-pyrazol-1-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 4-(3-methyl-1H-pyrazol-1-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1402240-24-7 C15H20BN3O2
4-(piperidin-1-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 4-(piperidin-1-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1402166-13-5 C16H25BN2O2
4-(tetrahydrofuran-2-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 4-(tetrahydrofuran-2-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223003-55-0 C15H22BNO3
4-propoxy-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 4-propoxy-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1356466-34-6 C14H22BNO3
5-(1-methyl-1H-pyrazol-4-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 5-(1-methyl-1H-pyrazol-4-yl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1402240-17-8 C15H20BN3O2
5-(cyclohexyloxy)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 5-(cyclohexyloxy)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223038-97-7 C17H26BNO3
5-(sec-butyl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 5-(sec-butyl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2223004-19-9 C15H24BNO2
6'-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3'-bipyridine 6'-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3'-bipyridine 1316275-50-9 C16H19BN2O2
N-ethyl-N-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine N-ethyl-N-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine 1415742-67-4 C14H23BN2O2
tert-butyl 2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)pyrrolidine-1-carboxylate tert-butyl 2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)pyrrolidine-1-carboxylate 2223009-44-5 C20H31BN2O4
tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperidine-1-carboxylate tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperidine-1-carboxylate 2222997-15-9 C21H33BN2O4
tert-butyl 4-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-4-yl)piperidine-1-carboxylate tert-butyl 4-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-4-yl)piperidine-1-carboxylate 2223028-79-1 C21H33BN2O4
3-(4-METHOXYPHENYL)PYRROLIDINE OXALATE 3-(4-METHOXYPHENYL)PYRROLIDINE OXALATE 96877-34-8 C13H17NO5
N2,N2-diethylthiazole-2,4-diamine N2,N2-diethylthiazole-2,4-diamine 748746-42-1 C7H13N3S
2,2'-Bipyridyl-5,5'-dialdehyde 2,2'-Bipyridyl-5,5'-dialdehyde 135822-72-9 C12H8N2O2
5-Chloro-1-methyl-1H-pyrazolo[4,3-d]pyrimidine 5-Chloro-1-methyl-1H-pyrazolo[4,3-d]pyrimidine 1393181-01-5 C6H5ClN4
6-(4-chlorophenyl)-2-cyclopropylpyrimidin-4-ol 6-(4-chlorophenyl)-2-cyclopropylpyrimidin-4-ol 1412959-63-7 C13H11ClN2O
6-methoxy-5-nitropyrimidin-4-amine 6-methoxy-5-nitropyrimidin-4-amine 73318-75-9 C5H6N4O3
4-Chloro-3-(3-fluoro-phenyl)-pyridin-2-ylamine 4-Chloro-3-(3-fluoro-phenyl)-pyridin-2-ylamine 1381941-71-4 C11H8ClFN2
4-Chlorooxazolo[4,5-c]pyridine 4-Chlorooxazolo[4,5-c]pyridine 1159829-15-8 C6H3ClN2O
6-(cyclopentyloxy)-3-pyridinylamine 6-(cyclopentyloxy)-3-pyridinylamine 748183-38-2 C10H14N2O
5-bromo-2-propoxy-1,3-thiazole 5-bromo-2-propoxy-1,3-thiazole 1086382-64-0 C6H8BrNOS
5-Amino-3,4,5,6-tetrahydro-2H-[1,3]bipyridinyl-4-ol 5-Amino-3,4,5,6-tetrahydro-2H-[1,3]bipyridinyl-4-ol 1563533-41-4 C10H15N3O
4-thien-2-yl-1,3-thiazol-2(3H)-one 4-thien-2-yl-1,3-thiazol-2(3H)-one 116269-84-2 C7H5NOS2
4-Fluoro-1-methyl-1H-pyrazole 4-Fluoro-1-methyl-1H-pyrazole 69843-14-7 C4H5FN2
4-bromo-2-cyclohexyloxy-1,3-thiazole 4-bromo-2-cyclohexyloxy-1,3-thiazole 1289078-14-3 C9H12BrNOS
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