Ramipril Diketopiperazine Acid

Ramipril diketopiperazine acid is a potential impurity found in commercial preparations of ramipril.Formal Name: (alphaS,3S,5aS,8aS,9aS)-decahydro-3-methyl-1,4-dioxo-alpha-(2-phenylethyl)-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazine-2-acetic acid. CAS Number: 108736-10-3. Synonyms: Ramipril Impurity K, Ramipril IK. Molecular Formula: C21H26N2O4. Formula Weight: 370.4. Purity: >95%. Formulation: (Request formulation change), A solid. Solubility: Ethanol: soluble. SMILES: O=C1N2[C@](C[C@@]3([H])[C@]2([H])CCC3)([H])C(N([C@H]1C)[C@H](C(O)=O)CCC4=CC=CC=C4)=O. InChi Code: InChI=1S/C21H26N2O4/c1-13-19(24)23-16-9-5-8-15(16)12-18(23)20(25)22(13)17(21(26)27)11-10-14-6-3-2-4-7-14/h2-4,6-7,13,15-18H,5,8-12H2,1H3,(H,26,27)/t13-,15-,16-,17-,18-/m0/s1. InChi Key: DZRWPCCIYKIPJW-HILJTLORSA-N.