Perindopril EP Impurity M

Chemical Name: (2S,3aS,7aS)-1-[(2S)-2-[[(1S)-1-(methoxycarbonyl)butyl]amino]propanoyl]octahydro-1H-indole-2-carboxylic acid

Synonym: (4R,12aS)-N-(2,6-difluorobenzyl)-7-hydroxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxamide