Tadalafil EP Impurity E

Chemical Name: (6R,12bR)-6-(benzo[d][1,3]dioxol-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

Smile: O=C([C@@]1([H])C(C(C(C=CC=C2)=C2N3)=O)C3(O)[C@](C4=CC=C(OCO5)C5=C4)([H])N16)N(C)CC6=O