(6R,12aR)-rel-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-(2-hydroxyethyl)-pyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 385769-94-8 ;

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2-methyl-2,3,6,7,12,12a-hexahydro pyrazino [1′,2′:1,6]-pyrido[3,4-b]indole-1,4-dione ; CAS # 171596-29-5 ;

Desmethylene Tadalafil ; CAS # 171489-03-5 ;

(6R,12aR)-6-(Benzo[d][1,3]dioxol-2-one-5-yl)-2-methyl-2,3,6,7,12,12a-hexahydro pyrazino [1′,2′:1,6]-pyrido[3,4-b]indole-1,4-dione ; CAS # 1346602-17-2 ;

Tadalafil (6R,12aS)-Isomer ; CAS # 171596-27-3 ;

N-Desmethyl epi-Tadalafil ; (6R,12aS)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro pyrazino [1′,2′:1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 929100-66-3 ;

Tadalafil (6S,12aS)-Isomer ; L-Tadalafil ; L-Tildenafil ; CAS # 629652-72-8 ;

Tadalafil (6S,12aR)-Isomer ; CAS # 171596-28-4 ;

(6bR)-12-(1,3-Benzodioxol-5-yl)-12a-hydroxy-8-methyl-6a,6b,8,9,12,12a-hexahydropyrazino[1′,2′:1,2]-pyrrolo[3,4-c]quinoline-6,7,10(5H)-trione ;

(6R,12aR,12bR)-6-(1,3-Benzodioxol-5-yl)-6a-hydroxy-2-methyl-2,3,6a,7,12a,12b-hexahydropyrazino[1′,2′:1,5]-pyrrolo[3,4-b]quinoline-1,4,12(6H)-trione ; CAS # 1978322-99-4 ;

(8a′R)-6′-(1,3-Benzodioxol-5-yl)-2′-methyl-2′,3′,8′,8a′-tetrahydro-6′H-spiro[3,1-benzoxazine-4,7′-pyrrolo[1,2a]pyrazine]-1′,2,4′(1H)-trione ; CAS # 2747958-44-5 ;

(12bR)-6-(1,3-Benzodioxol-5-yl)-12-hydroxy-2-methyl-2,3,6,12b-tetrahydropyrazino[1′,2′:1,5]pyrrolo[3,4-b]quinoline-1,4-dione ; CAS # 531500-48-8 (S-isomer) ;

Tadalafil Ketolactam ; (6R,14aR)-6-(1,3-Benzodioxol-5-yl)-2-methyl-2,3,14,14a-tetrahydropyrazino[1,2-d][1,4]benzodiazonine-1,4,7,13(6H,8H)-tetrone ; CAS # 1346605-38-6 ; 1978322-98-3 ;

(8a′R)-6′-(1,3-Benzodioxol-5-yl)-2′-methyl-2′,3′,8′,8a′-tetrahydro-6′H-spiro[indole-3,7′-pyrrolo[1,2-a]pyrazine]-1′,2,4′(1H)-trione ; CAS # 1795790-92-9 ;

5-(Chloromethyl)benzo[d][1,3]dioxole ; CAS # 20850-43-5 ;

(1R,3R)-1-(Benzo[d][1,3]dioxol-5-yl)-2-(2-(methylamino)acetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid ; CAS # 2058231-15-3 ;

(1R,3R)-2-Acetyl-1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid ; CAS # 1598416-07-9 ;

(1R,3R)-1-(Benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid ; CAS # 2058231-08-4 ;

(1R,3R)-1-(Benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxamide ; CAS # 1370438-57-5 ;

(1S,3R)-1-(Benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-N-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxamide ; CAS # 951661-84-0 ;

(1S,3R)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 629652-40-0 ;

(1R,3S)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 629652-44-4 ;

(1S,3R)-1-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxamide ; CAS # 951661-85-1 ;

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2-butyl-2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 171596-31-9 ;

(1R,3R)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2-(3-chloropropanoyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 395665-87-9 ;

5-Methylbenzo[d][1,3]dioxole ; CAS # 7145-99-5 ;

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-(2-hydroxypropyl)-pyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 1353020-85-5 ;

(1S,3R)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 171596-42-2 ;

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2,7-dimethyl-Pyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 477970-21-1 ;

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-octylpyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 1173706-35-8 ;

Chloropretadalafil ; Tadalafil Chloroacetyl Impurity ; (1R,3R)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 171489-59-1 ;

(1S,3S)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 629652-42-2 ;

(1S,3S)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 171596-43-3 ;

(1R,3R)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate HCl ; CAS # 171596-41-1 (base) ; 171752-68-4 (HCl) ;

Methyl 2-amino-3-(1H-indol-3-yl)propanoate hydrochloride ; CAS # 14907-27-8 (HCl) ; 22032-65-1 (Base) ;

(1R,3S)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate ; CAS # 171596-44-4 ;

(1R,3R)-1-(Benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid hydrochloride ; CAS # 474668-76-3 (HCl) ; 406938-39-4 (Base) ;

(1R,3R)-1-(Benzo[d][1,3]dioxol-5-yl)-N-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxamide ; CAS # 951661-82-8 ;

N-Desmethyl Tadalafil ; CAS # 171596-36-4 ;

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydropyrazino [1′,2′:1,6]-2-methyl-pyrido[3,4-b]indole-1,4-dione HCl ; CAS # 385769-84-6 (Base) :

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2-cyclopentyl-2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 171596-32-0 ;

(6R,12aR)-6-(1,3-Benzodioxol-5-yl)-2-ethyl-2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione ; CAS # 1609405-34-6 ;