Tadalafil EP Impurity A & C Mixture

Chemical Name: (6R,12aS)-6-(Benzo[d][1,3]dioxol-5-yl)-2-methyl-2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione compound with (6S,12aR)-6-(benzo[d][1,3]dioxol-5-yl)-2-methyl-2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione (1:1)

Smile: O=C([C@]1([H])CC2=C([C@](C3=CC=C(OCO4)C4=C3)([H])N15)NC6=C2C=CC=C6)N(C)CC5=O.O=C([C@@]7([H])CC8=C([C@@](C9=CC=C(OCO%10)C%10=C9)([H])N7%11)NC%12=C8C=CC=C%12)N(C)CC%11=O