5,16,27-tris(benzyloxy)-31-cyano-4,12,15,23,26-pentaoxo-5,11,16,22,27-pentaazahentriacontanoic acid

27-[N-(tert-butoxycarbonyl)-N-(benzyloxy)amino]-6,17-bis(benzyloxy)-7,10,18,21-tetraoxo-6,11,17,22-tetraazaheptacosanenitrile