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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
tert-butyl 3-(4-cyclopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazol-2-yl)morpholine-4-carboxylate tert-butyl 3-(4-cyclopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazol-2-yl)morpholine-4-carboxylate
tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)morpholine-4-carboxylate tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)morpholine-4-carboxylate
2-cyclopropyl-4-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole 2-cyclopropyl-4-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole
4-cyclopropyl-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole 4-cyclopropyl-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole
4-chloro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-7H-pyrrolo[2,3-d]pyrimidine 4-chloro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-7H-pyrrolo[2,3-d]pyrimidine
4-methoxy-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5-(trifluoromethyl)pyridine 4-methoxy-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5-(trifluoromethyl)pyridine
N,N-dimethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole-2-sulfonamide N,N-dimethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-1,2,3-triazole-2-sulfonamide
5-bromo-1-isopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole 5-bromo-1-isopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole 2364586-27-4 C11H19BBrN3O2
(5-fluoro-2-(methyl-d3)pyridin-4-yl-3,6-d2)boronic acid (5-fluoro-2-(methyl-d3)pyridin-4-yl-3,6-d2)boronic acid 2368221-13-8 C6H2BD5FNO2
(6-(difluoromethyl-d)pyridin-3-yl-2,4,5-d3)boronic acid (6-(difluoromethyl-d)pyridin-3-yl-2,4,5-d3)boronic acid 2710297-86-0 C6H2BD4F2NO2
6-(4-Fluorophenyl)-nicotinic acid 6-(4-Fluorophenyl)-nicotinic acid 223127-24-0 C12H8FNO2
4-Bromo-1-(4-fluorophenyl)-1H-pyrazole 4-Bromo-1-(4-fluorophenyl)-1H-pyrazole 957062-56-5 C9H6BrFN2
5-bromo-1-methyl-1,2,4-triazole 5-bromo-1-methyl-1,2,4-triazole 16681-72-4 C3H4BrN3
3,5-Dibromo-2-hydroxy-4-methylpyridine 3,5-Dibromo-2-hydroxy-4-methylpyridine 89581-53-3 C6H5Br2NO
3-Methyl-5-nitroquinoline 3-Methyl-5-nitroquinoline 103754-53-6 C10H8N2O2
2,3-DIHYDRO-1-BENZOFURAN-7-YLMETHYLAMINE 2,3-DIHYDRO-1-BENZOFURAN-7-YLMETHYLAMINE 361393-65-9 C9H11NO
5,6,7,8-TETRAHYDRO-4H-CYCLOHEPTA[B]THIOPHENE-2-CARBOXYLIC ACID 5,6,7,8-TETRAHYDRO-4H-CYCLOHEPTA[B]THIOPHENE-2-CARBOXYLIC ACID 40133-08-2 C10H12O2S
2-BROMO-4,5,6,7-TETRAHYDROTHIENO[3,2-C]PYRIDINE 2-BROMO-4,5,6,7-TETRAHYDROTHIENO[3,2-C]PYRIDINE 226386-47-6 C7H8BrNS
Disodium (1-methyl-4-oxoimidazolidin-2-ylidene)phosphoramidate Disodium (1-methyl-4-oxoimidazolidin-2-ylidene)phosphoramidate 19604-05-8 C4H9N3NaO4P
2-Ethoxy-3-Bromo-5-Nitropyridine 2-Ethoxy-3-Bromo-5-Nitropyridine 74919-31-6 C7H7BrN2O3
Cyclohexanecarboxamide, N-[2-[(ethylsulfonyl)amino]-5-(trifluoromethyl)-3-pyridinyl]-, sodium salt, hydrate (1:1:1) Cyclohexanecarboxamide, N-[2-[(ethylsulfonyl)amino]-5-(trifluoromethyl)-3-pyridinyl]-, sodium salt, hydrate (1:1:1) 351999-87-6 C15H23F3N3NaO4S
2-bromo-N-(methyl-d3)pyridin-3,5,6-d3-4-amine 2-bromo-N-(methyl-d3)pyridin-3,5,6-d3-4-amine 2645411-76-1 C6HBrD6N2
Pyrimidine, 4-(6-bromo-2-pyridinyl)-2-chloro- Pyrimidine, 4-(6-bromo-2-pyridinyl)-2-chloro- 1185308-24-0 C9H5BrClN3
Ethanone, 2,2,2-trifluoro-1-(1-methyl-1H-imidazol-2-yl)- (9CI) Ethanone, 2,2,2-trifluoro-1-(1-methyl-1H-imidazol-2-yl)- (9CI) 62366-56-7 C6H5F3N2O
Pyrrolidine, 2-[(3-bromo-2-thienyl)methyl]- Pyrrolidine, 2-[(3-bromo-2-thienyl)methyl]- 1342415-22-8 C9H12BrNS
2-Chloro-4-(3,4-difluoro-phenyl)-pyrimidine 2-Chloro-4-(3,4-difluoro-phenyl)-pyrimidine 954218-48-5 C10H5ClF2N2
2-Chloro-4-(4-ethyl-phenyl)-pyrimidine 2-Chloro-4-(4-ethyl-phenyl)-pyrimidine 954217-47-1 C12H11ClN2
4-chloro-2-methylquinazoline 4-chloro-2-methylquinazoline 6484-24-8 C9H7ClN2
2-Pyrimidinamine, 5-(trifluoromethyl)- (9CI) 2-Pyrimidinamine, 5-(trifluoromethyl)- (9CI) 69034-08-8 C5H4F3N3
4(1H)-Pyrimidinone, 2-(1-methylethyl)- (9CI) 4(1H)-Pyrimidinone, 2-(1-methylethyl)- (9CI) 68210-25-3 C7H10N2O
4(1H)-Pyrimidinone, 6-cyclopropyl-2-methyl- (9CI) 4(1H)-Pyrimidinone, 6-cyclopropyl-2-methyl- (9CI) 7043-05-2 C8H10N2O
4H-Pyrazolo[3,4-d]pyrimidin-4-one, 1,5-dihydro-6-methyl- (9CI) 4H-Pyrazolo[3,4-d]pyrimidin-4-one, 1,5-dihydro-6-methyl- (9CI) 30129-57-8 C6H6N4O
4-Pyridinol, 2-(difluoromethyl)- (9CI) 4-Pyridinol, 2-(difluoromethyl)- (9CI) 501125-75-3 C6H5F2NO
N.N-bis(4-(naphthalen-1-yl)phenyl)-2-(naphtho[1.2-b]benzofuran-7-yl)aniline N.N-bis(4-(naphthalen-1-yl)phenyl)-2-(naphtho[1.2-b]benzofuran-7-yl)aniline 2757762-87-9 C54H35NO
8-fluoro-2-methylimidazo[1,2-a]pyridine-6-carbonit 8-fluoro-2-methylimidazo[1,2-a]pyridine-6-carbonit
2-(PHENYLMETHYL)-2,7-DIAZASPIRO[4.4]NONANE 2-(PHENYLMETHYL)-2,7-DIAZASPIRO[4.4]NONANE 885275-27-4 C14H20N2
Imidazo[1,2-a]pyridine, HCl Imidazo[1,2-a]pyridine, HCl 34167-64-1 C7H7ClN2
5-NITROTHIOPHENE-2-CARBOXYLICMETHYLESTER 5-NITROTHIOPHENE-2-CARBOXYLICMETHYLESTER 5832-01-9 C6H5NO4S
2-Chloro-4-methylquinazoline 2-Chloro-4-methylquinazoline 6141-14-6 C9H7ClN2
H-Lys-Pro-AMC H-Lys-Pro-AMC 133066-53-2 C21H28N4O4
4-CHLORO-2-(4-ETHYLPHENYL)PYRIMIDINE 4-CHLORO-2-(4-ETHYLPHENYL)PYRIMIDINE 1155594-97-0 C12H11ClN2
5,7-DICHLORO-2-METHYL-[1,2,4]TRIAZOLO[1,5-A]PYRIMIDINE 5,7-DICHLORO-2-METHYL-[1,2,4]TRIAZOLO[1,5-A]PYRIMIDINE 1373519-64-2 C6H4Cl2N4
5-BROMOIMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID 5-BROMOIMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID 1026201-52-4 C8H5BrN2O2
6-BROMO[1,2,4]TRIAZOLO[4,3-A]PYRIMIDINE 6-BROMO[1,2,4]TRIAZOLO[4,3-A]PYRIMIDINE 1019023-12-1 C5H3BrN4
7-CHLORO[1,2,4]TRIAZOLO[1,5-C]PYRIMIDINE 7-CHLORO[1,2,4]TRIAZOLO[1,5-C]PYRIMIDINE 1159811-23-0 C5H3ClN4
1-P-TOLYLPYRAZOLE 1-P-TOLYLPYRAZOLE 20518-17-6 C10H10N2
1-[2-(3-BROMOPHENOXY)ETHYL]-PYRROLIDINE 1-[2-(3-BROMOPHENOXY)ETHYL]-PYRROLIDINE 23136-18-7 C12H16BrNO
5-chloro-7-methyl-1H-pyrrolo[3,2-b]pyridine 5-chloro-7-methyl-1H-pyrrolo[3,2-b]pyridine 357263-43-5 C8H7ClN2
PYRIDO[3,4-D]PYRIMIDINE-2,4(1H,3H)-DIONE PYRIDO[3,4-D]PYRIMIDINE-2,4(1H,3H)-DIONE 21038-67-5 C7H5N3O2
1-[4-(BROMOMETHYL)PHENYL]-1H-PYRAZOLE 1-[4-(BROMOMETHYL)PHENYL]-1H-PYRAZOLE 368869-85-6 C10H9BrN2
2-(ETHYLTHIO)-2-IMIDAZOLINE 2-(ETHYLTHIO)-2-IMIDAZOLINE 7320-60-7 C5H10N2S
4-PROPYL-6-HYDROXY-2-METHYLPYRIMIDINE 4-PROPYL-6-HYDROXY-2-METHYLPYRIMIDINE 89967-18-0 C8H12N2O
Benzo[b]naphtho[2,1-d]furan, 7-benz[a]anthracen-7-yl- Benzo[b]naphtho[2,1-d]furan, 7-benz[a]anthracen-7-yl- 2949384-89-6 C34H20O
hexadecyl 4-chloro-3-[2-(5,5-dimethyl-2,4-dioxo-1,3-oxazolidin-3-yl)-4,4-dimethyl-3-oxopentamido]benzoate hexadecyl 4-chloro-3-[2-(5,5-dimethyl-2,4-dioxo-1,3-oxazolidin-3-yl)-4,4-dimethyl-3-oxopentamido]benzoate 168689-49-4 C35H53ClN2O7
1-N-TRITYL-IMIDAZOLE-2-YLPROPIONIC ACID
1-N-TRITYL-IMIDAZOLE-2-YLPROPIONIC ACID 675602-85-4 C25H22N2O2
(3S,4R)-(-)-4-(4'-FLUOROPHENYL)3-HYDROXYMETHYL)-PIPERIDINE
(3S,4R)-(-)-4-(4'-FLUOROPHENYL)3-HYDROXYMETHYL)-PIPERIDINE 125224-43-3 C12H16FNO
2,4-dichloro-5-ethylpyrimidine 2,4-dichloro-5-ethylpyrimidine C6H6Cl2N2
Pyrimidine, 2-(4,4-difluoro-1-piperidinyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- Pyrimidine, 2-(4,4-difluoro-1-piperidinyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 2300135-99-1 C15H22BF2N3O2
Methanethione, (4-methoxyphenyl)-1-pyrrolidinyl- Methanethione, (4-methoxyphenyl)-1-pyrrolidinyl- 80282-57-1 C12H15NOS
7-Bromoindole 7-Bromoindole 51417-51-7 C8H6BrN
4-Iodoimidazole 4-Iodoimidazole 71759-89-2 C3H3IN2
Pyridine, 2-bromo-6-(1H-imidazol-2-yl)- Pyridine, 2-bromo-6-(1H-imidazol-2-yl)- 1211586-97-8 C8H6BrN3
2(1H)-Pyridinone, 4-bromo-3-ethyl- 2(1H)-Pyridinone, 4-bromo-3-ethyl- 1823222-48-5 C7H8BrNO
Thiazole, 5-bromo-4-(3-methylphenyl)- Thiazole, 5-bromo-4-(3-methylphenyl)- 1243838-88-1 C10H8BrNS
Morpholine, 4-(5-bromo-4-methyl-2-pyrimidinyl)- Morpholine, 4-(5-bromo-4-methyl-2-pyrimidinyl)- 1400760-55-5 C9H12BrN3O
Pyridine, 4-bromo-2-methyl-3-(trifluoromethyl)- Pyridine, 4-bromo-2-methyl-3-(trifluoromethyl)- 2386007-44-7 C7H5BrF3N
2-(methyl-d2)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-3,4,6-d3 2-(methyl-d2)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-3,4,6-d3 2819702-30-0 C12H18BNO2
3-(methyl-d2)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-2,4,6-d3 3-(methyl-d2)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine-2,4,6-d3 2819702-48-0 C12H18BNO2
2-(methyl-d2)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-(methyl-d2)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2819702-62-8
3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine-4,5,6-d3 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine-4,5,6-d3 2819703-05-2 C12H15BF3NO2
tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)piperidine-1-carboxylate-2,2,3,4,4,5,5,6,6-d9 tert-butyl 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)piperidine-1-carboxylate-2,2,3,4,4,5,5,6,6-d9 2819703-17-6 C21H33BN2O4
4-methoxy-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 4-methoxy-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazole 2819706-00-6 C11H18BNO3S
1-(methyl-d3)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one-3,5,6-d3 1-(methyl-d3)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one-3,5,6-d3 2819705-08-1 C12H18BNO3
5-isopropyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)quinoxaline 5-isopropyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)quinoxaline 2819706-55-1 C17H23BN2O2
2-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)tetrahydro-4H-pyran-4-one 2-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)tetrahydro-4H-pyran-4-one 2819707-05-4 C16H22BNO4
3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)tetrahydro-4H-pyran-4-one 3-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)tetrahydro-4H-pyran-4-one 2819707-20-3 C16H22BNO4
3-isopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridazine 3-isopropyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridazine 2819707-25-8 C13H21BN2O2
1-(difluoromethyl-d)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one-3,4,6-d3 1-(difluoromethyl-d)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one-3,4,6-d3 2819705-25-2 C12H16BF2NO3
1,1'-(butane-1,4-diyl)bis(3-(pent-4-yn-1-yl)-1H-imidazol-3-ium) bromide 1,1'-(butane-1,4-diyl)bis(3-(pent-4-yn-1-yl)-1H-imidazol-3-ium) bromide 1975129-29-3 C18H26BrN6+
Imidazo[1,2-b]pyridazine, 6-bromo-8-methyl- Imidazo[1,2-b]pyridazine, 6-bromo-8-methyl- 2645412-34-4 C7H6BrN3
[2,2'-Bipyridine]-6-carboxaldehyde, 6'-bromo- [2,2'-Bipyridine]-6-carboxaldehyde, 6'-bromo- 162084-84-6 C11H7BrN2O
Pyridazine, 5-bromo-3-cyclopropyl- Pyridazine, 5-bromo-3-cyclopropyl- 1892856-70-0 C7H7BrN2
1H-1,2,3-Triazole, 1-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 1H-1,2,3-Triazole, 1-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 2223053-52-7 C10H18BN3O2
1-Ethyl-3,5-dimethyl-1H-pyrazole 1-Ethyl-3,5-dimethyl-1H-pyrazole 17629-26-4 C7H12N2
Cyclic octaatomic sulfur Cyclic octaatomic sulfur 10544-50-0 S8
3-Chloroimidazo[1,2-a]pyridine-2-carboxylic acid ethyl ester 3-Chloroimidazo[1,2-a]pyridine-2-carboxylic acid ethyl ester 1000017-95-7 C10H9ClN2O2
2(3H)-Benzothiazolethione,6-methoxy-(9CI) 2(3H)-Benzothiazolethione,6-methoxy-(9CI) 2182-73-2 C8H7NOS2
2H-Naphth[1,2-d]imidazol-2-one,5-amino-1,3-dihydro-(9CI) 2H-Naphth[1,2-d]imidazol-2-one,5-amino-1,3-dihydro-(9CI) 75370-64-8 C11H9N3O
4-Pyridinamine,3-propyl-(9CI) 4-Pyridinamine,3-propyl-(9CI) 496837-19-5 C8H12N2
1H-Pyrazole,5-bromo-1-methyl-(9CI) 1H-Pyrazole,5-bromo-1-methyl-(9CI) 361476-01-9 C4H5BrN2
1,1-Dimethylethyl 4-(2-bromo-4-pyrimidinyl)-1-piperazinecarboxylate 1,1-Dimethylethyl 4-(2-bromo-4-pyrimidinyl)-1-piperazinecarboxylate 2363782-51-6 C13H19BrN4O2
L-Lysine, glycyl-L-histidyl-, hydrochloride (1:1) L-Lysine, glycyl-L-histidyl-, hydrochloride (1:1) 2758277-85-7 C14H24N6O4.ClH
B-(2-Methyl-6-phenyl-3-pyridinyl)boronic acid B-(2-Methyl-6-phenyl-3-pyridinyl)boronic acid 2710290-28-9 C12H12BNO2
Pyridine, 3-bromo-5-(2,4-difluorophenyl)- Pyridine, 3-bromo-5-(2,4-difluorophenyl)- 1070882-69-7 C11H6BrF2N
(S)-3-Fluoro-pyrrolidine hydrochloride (S)-3-Fluoro-pyrrolidine hydrochloride 136725-53-6 C4H9ClFN
3,5-Dibromo-2-(cyclopentyloxy)pyridine 3,5-Dibromo-2-(cyclopentyloxy)pyridine 1289125-20-7 C10H11Br2NO
(p-SCN-Bn)-NOTA (p-SCN-Bn)-NOTA 147597-66-8 C20H26N4O6S
2-Aminoimidazole 2-Aminoimidazole 7720-39-0 C3H5N3
5-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 5-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 2711075-24-8 C13H17BF3NO2
3,4-DIBROMOFURAN 3,4-DIBROMOFURAN 32460-02-9 C4H2Br2O
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