| Structure | Chemical Name | CAS | MF | 
| ![2,3-Dihydropyrido[2,3-d][1,3]oxazol-2-one](../cas/gif/60832-72-6.gif) | 2,3-Dihydropyrido[2,3-d][1,3]oxazol-2-one | 60832-72-6 | C6H4N2O2 | 
|  | Chelidamic acid | 138-60-3 | C7H5NO5 | 
| ![6,7-Dihydro-5H-pyrrolo[3,4-b]pyridine](../cas/gif/147739-88-6.gif) | 6,7-Dihydro-5H-pyrrolo[3,4-b]pyridine | 147739-88-6 | C7H8N2 | 
| ![5-BROMO-2,3-DIHYDRO-1H-PYRROLO[2,3-B]PYRIDINE](../cas/gif/115170-2d40-6.gif) | 5-BROMO-2,3-DIHYDRO-1H-PYRROLO[2,3-B]PYRIDINE | 115170-40-6 | C7H7BrN2 | 
|  | METHYL 2-OXO-1,2-DIHYDRO-3-PYRIDINECARBOXYLATE | 10128-91-3 | C7H7NO3 | 
|  | DIETHYL 1,4-DIHYDRO-2,4,6-TRIMETHYL-3,5-PYRIDINEDICARBOXYLATE | 632-93-9 | C14H21NO4 | 
| ![tert-Butyl 2,4-dichloro-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine-7-carboxylate](../cas/gif/916420-27-4.gif) | tert-Butyl 2,4-dichloro-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine-7-carboxylate | 916420-27-4 | C12H15Cl2N3O2 | 
| ![4-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)-3,6-DIHYDRO-2H-PYRIDINE-1-CARBOXYLIC ACID BENZYL ESTER](../cas/gif/286961-15-7.gif) | 4-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)-3,6-DIHYDRO-2H-PYRIDINE-1-CARBOXYLIC ACID BENZYL ESTER | 286961-15-7 | C19H26BNO4 | 
| ![3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE](../cas/gif/5439-14-5.gif) | 3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE | 5439-14-5 | C8H8N2O | 
| ![4,5-DIHYDRO-4-OXOFURO[3,2-C]PYRIDINE](../cas/gif/26956-43-4.gif) | 4,5-DIHYDRO-4-OXOFURO[3,2-C]PYRIDINE | 26956-43-4 | C7H5NO2 | 
|  | 6,7-DIHYDRO-5H-1-PYRIDIN-5-ONE | 28566-14-5 | C8H7NO | 
| ![6,7-Dihydro-5H-pyrrolo[3,4-b]pyridine dihydrochloride](../cas/gif/147740-02-1.gif) | 6,7-Dihydro-5H-pyrrolo[3,4-b]pyridine dihydrochloride | 147740-02-1 | C7H9ClN2 | 
| ![2,3-Dihydro-1,4-dioxino[2,3-b]pyridine](../cas/gif/129421-32-5.gif) | 2,3-Dihydro-1,4-dioxino[2,3-b]pyridine | 129421-32-5 | C7H7NO2 | 
| ![9-METHYL-3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE](../cas/gif/61751-44-8.gif) | 9-METHYL-3,4-DIHYDRO-2H-PYRIDO[1,2-A]PYRIMIDIN-2-ONE | 61751-44-8 | C9H10N2O | 
| ![5-FLUORO-1H-PYRROLO[2,3-B]PYRIDINE](../cas/gif/866319-00-8.gif) | 5-FLUORO-1H-PYRROLO[2,3-B]PYRIDINE | 866319-00-8 | C7H5FN2 | 
| ![5-BROMO-1H-PYRAZOLO[3,4-B]PYRIDIN-3-YLAMINE](../cas/gif/405224-24-0.gif) | 5-BROMO-1H-PYRAZOLO[3,4-B]PYRIDIN-3-YLAMINE | 405224-24-0 | C6H5BrN4 | 
| ![2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE HYDROCHLORIDE](../cas/gif/651558-58-6.gif) | 2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE HYDROCHLORIDE | 651558-58-6 | C7H9ClN2 | 
| ![7-Bromo-1,3-dihydro-imidazo[4,5-c]pyridin-2-one](../cas/gif/161836-12-0.gif) | 7-Bromo-1,3-dihydro-imidazo[4,5-c]pyridin-2-one | 161836-12-0 | C6H4BrN3O | 
| ![3-NITRO-6,7-DIHYDRO-5H-CYCLOPENTA[B]PYRIDINE](../cas/gif/84531-36-2.gif) | 3-NITRO-6,7-DIHYDRO-5H-CYCLOPENTA[B]PYRIDINE | 84531-36-2 | C8H8N2O2 | 
| ![5H-Cyclopenta[b]pyridin-7-amine,6,7-dihydro-,(7S)-(9CI)](../cas/gif/502612-54-6.gif) | 5H-Cyclopenta[b]pyridin-7-amine,6,7-dihydro-,(7S)-(9CI) | 502612-54-6 | C8H10N2 | 
| ![2-chloro-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine](../cas/gif/810668-57-6.gif) | 2-chloro-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine | 810668-57-6 | C7H7ClN2 | 
| ![1,3-Dihydro-2H-pyrrolo[3,2-b]pyridin-2-one](../cas/gif/32501-05-6.gif) | 1,3-Dihydro-2H-pyrrolo[3,2-b]pyridin-2-one | 32501-05-6 | C7H6N2O | 
|  | N-Boc-3,4-dihydro-2H-pyridine | 131667-57-7 | C10H17NO2 | 
| ![7H-CYCLOPENTA[B]PYRIDIN-7-ONE, 5,6-DIHYDRO-](../cas/gif/31170-78-2.gif) | 7H-CYCLOPENTA[B]PYRIDIN-7-ONE, 5,6-DIHYDRO- | 31170-78-2 | C8H7NO | 
|  | 1-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid | 3719-45-7 | C7H7NO3 | 
| ![4-chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate](../cas/gif/945666-87-5.gif) | 4-chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate | 945666-87-5 | C10H10ClNO2 | 
| ![4-chloro-2,3-dihydro-1H-pyrrolo[3,2-c]pyridine](../cas/gif/494767-29-2.gif) | 4-chloro-2,3-dihydro-1H-pyrrolo[3,2-c]pyridine | 494767-29-2 | C7H7ClN2 | 
| ![tert-Butyl 7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate](../cas/gif/192869-49-1.gif) | tert-Butyl 7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate | 192869-49-1 | C12H17N3O2 | 
| ![2,3-Dihydro-1H-Pyrrolo[3,4-C]Pyridine dihydrochloride](../cas2/gif/6000-50-6.gif) | 2,3-Dihydro-1H-Pyrrolo[3,4-C]Pyridine dihydrochloride | 6000-50-6 | C7H9ClN2 | 
|  | 1-(4-iodophenyl)-3-morpholino-5,6-dihydropyridin-2(1H)-one | 473927-69-4 | C15H17IN2O2 | 
|  | 2-OXO-6-PHENYL-1,2-DIHYDRO-PYRIDINE-3-CARBOXYLIC ACID | 56162-63-1 | C12H9NO3 | 
| ![2H-Pyrano[3,2-b]pyridin-4-ol, 3,4-dihydro- (9CI)](../cas/gif/754149-09-2.gif) | 2H-Pyrano[3,2-b]pyridin-4-ol, 3,4-dihydro- (9CI) | 754149-09-2 | C8H9NO2 | 
| ![4H-Pyrano[3,2-b]pyridin-4-one,2,3-dihydro-(9CI)](../cas/gif/405174-48-3.gif) | 4H-Pyrano[3,2-b]pyridin-4-one,2,3-dihydro-(9CI) | 405174-48-3 | C8H7NO2 | 
| ![5H-Cyclopenta[b]pyridin-5-amine,6,7-dihydro-(9CI)](../cas/gif/535935-84-3.gif) | 5H-Cyclopenta[b]pyridin-5-amine,6,7-dihydro-(9CI) | 535935-84-3 | C8H10N2 | 
|  | benzyl 3,4-dihydro-2-methyl-4-oxopyridine-1(2H)-carboxylate | 190906-91-3 | C14H15NO3 | 
|  | METHYL 2-HYDROXY-5-IODONICOTINATE | 116387-40-7 | C7H6INO3 | 
| ![2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE](../cas/gif/496-13-9.gif) | 2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE | 496-13-9 | C7H8N2 | 
| ![Pyrido[3,4-d]pyrimidin-4(3H)-one (8CI,9CI)](../cas/gif/19178-2d25-7.gif) | Pyrido[3,4-d]pyrimidin-4(3H)-one (8CI,9CI) | 19178-25-7 | C7H5N3O | 
| ![7H-Pyrrolo[2,3-c]pyridin-7-one,1,6-dihydro-(9CI)](../cas/gif/259684-36-1.gif) | 7H-Pyrrolo[2,3-c]pyridin-7-one,1,6-dihydro-(9CI) | 259684-36-1 | C7H6N2O | 
| ![tert-butyl 2-chloro-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate](../cas2/gif/1092352-55-0.gif) | tert-butyl 2-chloro-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate | 1092352-55-0 | C12H16ClN3O2 | 
| ![2,3-dihydro-[1,4]dioxino[2,3-b]pyridine-6-carbaldehyde](../cas/gif/615568-24-6.gif) | 2,3-dihydro-[1,4]dioxino[2,3-b]pyridine-6-carbaldehyde | 615568-24-6 | C8H7NO3 | 
| ![1-Cyclopropyl-1,3-dihydroimidazo[4,5-c]pyridine-2-one](../cas2/gif/380605-29-8.gif) | 1-Cyclopropyl-1,3-dihydroimidazo[4,5-c]pyridine-2-one | 380605-29-8 | C9H9N3O | 
| ![5H-Cyclopenta[b]pyridine, 4-chloro-6,7-dihydro-](../cas/gif/54664-55-0.gif) | 5H-Cyclopenta[b]pyridine, 4-chloro-6,7-dihydro- | 54664-55-0 | C8H8ClN | 
| ![2,3-DIHYDRO[1,4]DIOXINO[2,3-C]PYRIDINE-7-CARBALDEHYDE](../cas/gif/443955-90-6.gif) | 2,3-DIHYDRO[1,4]DIOXINO[2,3-C]PYRIDINE-7-CARBALDEHYDE | 443955-90-6 | C8H7NO3 | 
| ![Imidazo[1,5-a]pyridin-8(5H)-one, 6,7-dihydro- (9CI)](../cas/gif/426219-51-4.gif) | Imidazo[1,5-a]pyridin-8(5H)-one, 6,7-dihydro- (9CI) | 426219-51-4 | C7H8N2O | 
|  | 1-Methylthyl-2-oxo-1,2-dihydropyridine-4-carboxylic acid | 33972-97-3 | C7H7NO3 | 
|  | TERT-BUTYL 5-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)-3,6-DIHYDROPYRIDINE-1(2H)-CARBOXYLATE | 885693-20-9 | C16H28BNO4 | 
| ![2,3-dihydro-[1,4]dioxino[2,3-b]pyridine-7-carbaldehyde](../cas/gif/95849-26-6.gif) | 2,3-dihydro-[1,4]dioxino[2,3-b]pyridine-7-carbaldehyde | 95849-26-6 | C8H7NO3 | 
|  | 3-(1-ACETYL-,4-DIHYDROPYRID-4-YL)INDOLE | 34981-12-9 | C15H14N2O | 
| ![3,4-Dihydro-2H-pyrido[3,2-b][1,4]oxazine](../cas/gif/20348-23-6.gif) | 3,4-Dihydro-2H-pyrido[3,2-b][1,4]oxazine | 20348-23-6 | C7H8N2O | 
|  | tert-butyl 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydropyridine-1(2H)-carboxylate | 865245-32-5 | C16H28BNO4 | 
|  | DIMETHYL 4-(4-METHOXYPHENYL)-2,6-DIMETHYL-1,4-DIHYDROPYRIDINE-3,5-DICARBOXYLATE | 73257-47-3 | C18H21NO5 | 
|  | BENZYL 2-OXO-1,2-DIHYDROPYRIDIN-3-YLCARBAMATE | 147269-67-8 | C13H12N2O3 | 
| ![1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-5-methoxy-(9CI)](../cas/gif/412030-10-5.gif) | 1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-5-methoxy-(9CI) | 412030-10-5 | C8H10N2O | 
|  | 4-Pyridinecarboxylicacid,1,2-dihydro-3-methyl-2-oxo-(9CI) | 126798-27-4 | C7H7NO3 | 
|  | 2,6-Dichloro-1,4-didihydropyridine-3,5-dicarboxyaldehyde | 81305-72-8 | C7H5Cl2NO2 | 
| ![1,4-Dihydro-7H-pyrazolo[4,3-b]pyridin-7-one](../cas/gif/94220-42-5.gif) | 1,4-Dihydro-7H-pyrazolo[4,3-b]pyridin-7-one | 94220-42-5 | C6H5N3O | 
|  | 4-(2,3-DICHLORO-PHENYL)-2,6-DIMETHYL-1,4-DIHYDRO-PYRIDINE-3,5-DICARBOXYLIC ACID MONOMETHYL ESTER | 105580-45-8 | C16H15Cl2NO4 | 
| ![2H-Imidazo[4,5-b]pyridin-2-one, 1,3-dihydro-7-methyl- (9CI)](../cas/gif/518038-75-0.gif) | 2H-Imidazo[4,5-b]pyridin-2-one, 1,3-dihydro-7-methyl- (9CI) | 518038-75-0 | C7H7N3O | 
| ![2H-Pyrido[4,3-b]-1,4-oxazine,3,4-dihydro-(9CI)](../cas/gif/102226-41-5.gif) | 2H-Pyrido[4,3-b]-1,4-oxazine,3,4-dihydro-(9CI) | 102226-41-5 | C7H8N2O | 
| ![decahydropyrido[1,2-a][1,4]diazepine](../cas/gif/71515-82-7.gif) | decahydropyrido[1,2-a][1,4]diazepine | 71515-82-7 | C9H18N2 | 
| ![2-Chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-ol](../cas/gif/911405-91-9.gif) | 2-Chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-ol | 911405-91-9 | C8H8ClNO | 
| ![6,7-Dihydro-5H-cyclopenta[b]pyridin-7-yl Acetate](../cas/gif/90685-59-9.gif) | 6,7-Dihydro-5H-cyclopenta[b]pyridin-7-yl Acetate | 90685-59-9 | C10H11NO2 | 
| ![7,8-dihydro-8-oxo-pyrido[2,3-d]pyridazine-5-carboxylic acid](../cas/gif/13629-38-4.gif) | 7,8-dihydro-8-oxo-pyrido[2,3-d]pyridazine-5-carboxylic acid | 13629-38-4 | C8H5N3O3 | 
|  | DI-TERT-BUTYL 2 6-DIMETHYL-1 4-DIHYDROP& | 55536-71-5 | C17H27NO4 | 
| ![3-BroMo-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine hydrochloride](../cas/gif/905273-36-1.gif) | 3-BroMo-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine hydrochloride | 905273-36-1 | C7H7BrN2 | 
| ![1-(2-Methoxyethyl)-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyriMidine-2-carboxylic acid Monohydrate, 96%](../cas/20130318/gif/cb22636928.gif) | 1-(2-Methoxyethyl)-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyriMidine-2-carboxylic acid Monohydrate, 96% |  | C14H15N3O5 | 
| ![3-[1,2-DIHYDRO-2-OXO-5-(TRIFLUOROMETHYL)PYRID-1-YL]PROPIONIC ACID 97](../cas/gif/175277-72-2.gif) | 3-[1,2-DIHYDRO-2-OXO-5-(TRIFLUOROMETHYL)PYRID-1-YL]PROPIONIC ACID 97 | 175277-72-2 | C9H8F3NO3 | 
| ![Furo[3,4-c]pyridine, 1,3-dihydro- (9CI)](../cas/gif/126230-90-8.gif) | Furo[3,4-c]pyridine, 1,3-dihydro- (9CI) | 126230-90-8 | C7H7NO | 
|  | Pyranoridine phosphate | 76748-86-2 | C29H35ClN5O6P | 
| ![2,3-Dihydro-2,7-dimethylfuro[2,3-c]pyridine](../cas/gif/69022-82-8.gif) | 2,3-Dihydro-2,7-dimethylfuro[2,3-c]pyridine | 69022-82-8 | C9H11NO | 
| ![6,7-dihydropyrrolo[3,4-b]pyridin-5-one](../cas2/gif/40107-93-5.gif) | 6,7-dihydropyrrolo[3,4-b]pyridin-5-one | 40107-93-5 | C7H6N2O | 
| ![1-benzyl-1,6-dihydro-pyrrolo[2,3-c]pyridin-7-one](../cas/gif/60290-2d20-2.gif) | 1-benzyl-1,6-dihydro-pyrrolo[2,3-c]pyridin-7-one | 60290-20-2 | C14H12N2O | 
|  | 3-Morpholin-4-yl-5,6-dihydro-1H-pyridin-2-one | 545445-40-7 | C9H14N2O2 | 
|  | 3,5-DIACETYL-1,4-DIHYDRO-2,6-LUTIDINE | 1079-95-4 | C11H15NO2 | 
|  | 2-(4,5-DIHYDRO-1H-IMIDAZOL-2-YL)PYRIDINE | 7471-05-8 | C8H9N3 | 
| ![1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-(9CI)](../cas/20180713/gif/760919-39-9.gif) | 1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-(9CI) | 760919-39-9 | C7H8N2 | 
| ![5-Boc-2-Methyl-6,7-dihydrothiazolo[5,4-c]pyridine](../cas/gif/220388-97-6.gif) | 5-Boc-2-Methyl-6,7-dihydrothiazolo[5,4-c]pyridine | 220388-97-6 | C12H18N2O2S | 
|  | Benzyl 4-oxo-3,4-dihydropyridine-1(2H)-carboxylate | 185847-84-1 | C13H13NO3 | 
|  | 5-METHYL-2-THIOXO-1,2-DIHYDROPYRIDINE-3-CARBONITRILE | 87373-59-9 | C7H6N2S | 
|  | 2-Amino-6,7-dihydro-5H-1-pyrindine | 146331-19-3 | C8H10N2 | 
|  | (R)-(+)-Ketorolac | 66635-93-6 | C15H13NO3 | 
|  | 1,6-Dihydro-4-hydroxy-2-methyl-6-(oxo)nicotinic acid ethyl ester | 3950-10-5 | C9H11NO4 | 
|  | 3-ACETYL-BENZOIC ACID METHYL ESTER | 915402-27-6 | C8H7N3O | 
| ![6-Bromo-2,3-dihydroimidazo[1,2-a]pyridine](../cas/gif/793628-63-4.gif) | 6-Bromo-2,3-dihydroimidazo[1,2-a]pyridine | 793628-63-4 | C7H7BrN2 | 
| ![7,8-dihydro-8-oxo-7-phenyl-pyrido[2,3-d]pyridazine-5-carboxylic acid](../cas/gif/13694-12-7.gif) | 7,8-dihydro-8-oxo-7-phenyl-pyrido[2,3-d]pyridazine-5-carboxylic acid | 13694-12-7 | C14H9N3O3 | 
|  | 2(1H)-Pyridinone, 3-(aminomethyl)-4,6-dimethyl- (9CI) | 771579-27-2 | C8H12N2O | 
| ![tert-Butyl 4-[(Trimethylsilanyl)oxy]-3,6-dihydro-2H-pyridine-1-carboxylate](../cas/gif/211108-48-4.gif) | tert-Butyl 4-[(Trimethylsilanyl)oxy]-3,6-dihydro-2H-pyridine-1-carboxylate | 211108-48-4 | C13H25NO3Si | 
|  | 3H-Pyrido(3,4-b)indole, 4,9-dihydro- | 4894-26-2 | C11H10N2 | 
|  | 2-HYDROXY-4,6-DIMETHYLNICOTINIC ACID | 24667-09-2 | C8H9NO3 | 
|  | (S)-Ketorolac | 66635-92-5 | C15H13NO3 | 
|  | Ethyl 4-(3-AMinophenyl)-5-(Methoxycarbonyl)-2,6-diMethyl-1,4-dihydropyridine-3-carboxylate | 138135-48-5 | C18H22N2O4 | 
|  | 1-(4-Fluorophenyl)-4-Methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile | 1267968-10-4 | C13H9FN2O | 
| ![1-n-Butyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyriMidine-2-carboxylic acid, 96%](../cas/gif/1086386-75-5.gif) | 1-n-Butyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyriMidine-2-carboxylic acid, 96% | 1086386-75-5 | C15H15N3O3 | 
| ![2-CHLORO-4-METHYL-6,7-DIHYDRO-5H-CYCLOPENTA[B]PYRIDINE](../cas/gif/83939-58-6.gif) | 2-CHLORO-4-METHYL-6,7-DIHYDRO-5H-CYCLOPENTA[B]PYRIDINE | 83939-58-6 | C8H9ClN2 | 
|  | 5-Isopropyl-3-methyl 2-formyl-1,4-dihydro-6-methyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate | 75530-60-8 | C19H20N2O7 | 
|  | Mivobulin | 122332-18-7 | C17H19N5O2 | 
| ![5H-CYCLOPENTA[B]PYRIDIN-7-AMINE, 6,7-DIHYDRO-](../cas/gif/185122-75-2.gif) | 5H-CYCLOPENTA[B]PYRIDIN-7-AMINE, 6,7-DIHYDRO- | 185122-75-2 | C8H10N2 | 
|  | 4-Chloro-6,7-dihydro-5H-cyclopenta-pyridin-7-OL | 126053-15-4 | C8H8ClNO | 
|  | 6-ISOPROPYL-2-OXO-1,2-DIHYDRO-PYRIDINE-3-CARBOXYLIC ACID | 98483-00-2 | C9H11NO3 |