Ethyl (2S)2-[(3S,5aS,8aS, 9aS)-3-methyl-1,4-dioxodecahydro-1H-cyclopenta[e]pyrrolo[1,2-a]pyrazin-2-yl]-4-phenylbutanoate

Ethyl (2S)2-[(3S,5aS,8aS, 9aS)-3-methyl-1,4-dioxodecahydro-1H-cyclopenta[e]pyrrolo[1,2-a]pyrazin-2-yl]-4-phenylbutanoate, pharmaceutical secondary standard, certified reference material