1-[4-(2-tert-Butyl-2H-tetrazol-5-yl)-phenyl]-4(S)-hydroxy-5(S)-2,5-bis[N-(N-methoxycarbonyl-(L)-tert-leucyl)amino]-6-phenyl-2-azahexane 198904-20-0 2,5,6,10,13-Pentaazatetradecanedioic acid, 3,12-bis(1,1-dimethylethyl)-6-[[4-[2-(1,1-dimethylethyl)-2H-tetrazol-5-yl]phenyl]methyl]-8-hydroxy-4,11-dioxo-9-(phenylmethyl)-, dimethyl ester, (3S,8S,9S,12S)- AIDS-057744 AIDS057744 Heterocyclic Azahexane deriv.