4-[1-{5-Tert-Butoxycarbonylamino-1-[2-(carbamoylmethyl-carbamoyl)-pyrrolidine-1-carbonyl]-pentylcarbamoyl}-2-(1H-indol-3-yl)-ethylcarbamoyl]-4-(9H-fluoren-9-ylmethoxycarbonylamino)-butyric acid tert-butyl ester AIDS-112892 AIDS112892 NSC672436 NSC672437