Tadalafil EP Impurity F

Chemical Name: (8a'R)-6'-(benzo[d][1,3]dioxol-5-yl)-2'-methyl-2',3',8',8a'-tetrahydro-6'H-spiro[benzo[d][1,3]oxazine-4,7'-pyrrolo[1,2-a]pyrazine]-1',2,4'(1H)-trione

Smile: O=C([C@]1([H])N2C([H])(C3=CC(OCO4)=C4C=C3)C5(C(C=CC=C6)=C6NC(O5)=O)C1)N(C)CC2=O