Not less than-95.0%
1-[2-[[1-(Ethoxycarbonyl)butyl]amino]propanoyl]octahydro-1H-indole-2-carboxylic acid, (2RS,3aSR,7aRS)-, (2'RS)-, (1"RS)-; (2RS,3aRS,7aRS)-, (2′SR)-, (1″RS)-: (±)-2′-epi-perindopril