Ramipril diketopiperazine acid; (S)-2-((3S,5aS,8aS,9aS)-3-methyl-1,4-dioxooctahydro-1H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2(5aH)-yl)-4-phenylbutanoic acid;Ramiprilat Diketopiperazine;(2S)-2-[(3S,5aS,8aS,9aS)-3-Methyl-1,4-dioxodecahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl]-4-phenylbutanoic Acid (Ramipril Diketopiperazine Acid);2H-Cyclopenta(4,5)pyrrolo(1,2-a)pyrazine-2-acetic acid, decahydro-3-methyl-1,4-dioxo-alpha-(2-phenylethyl)-, (alphaS,3S,5aS,8aS,9aS)-
