Chemical Name: (αS,3S,11aS)-1,3,4,6,11,11a-Hexahydro-3-methyl-1,4-dioxo-α-(2-phenylethyl)-2H-pyrazino[1,2-b]isoquinoline-2-acetic Acid
Synonym: Quinapril USP Related Compound A ; Quinapril Diketopiperazine
Smile: [H][C@]1(C2=O)N(CC(C=CC=C3)=C3C1)C([C@H](C)N2[C@H](C(OCC)=O)CCC4=CC=CC=C4)=O