2-(2-Acetylamino-3-carboxy-propionylamino)-succinic acid 1-[1-(1-{4-benzyloxy-2-[N'-(3-phenyl-propionyl)-N'-propyl-hydrazinocarbonyl]-pyrrolidine-1-carbonyl}-2-methyl-propylcarbamoyl)-2-methyl-butyl] ester AIDS-216300 AIDS216300