AIDS-163678 AIDS163678 Carbamic acid, [(1S)-3-amino-1-[[[(1S,2S)-3-[(2S)-2-(1-aziridinylcarbonyl)-1-pyrrolidinyl]-2-hydroxy-3-oxo-1-(phenylmethyl)propyl]amino]carbonyl]-3-oxopropyl]-, phenylmethyl ester PhCH2-O-CO-Asn-(2S, 3S)-AHPBA-Pro-NH-cyclopropyl