AIDS-085909 AIDS085909 L-756,423 L-756423 MK-944a N-(2(R)-Hydroxy-1(S)-indanyl)-2(R)-phenylmethyl-4(S)-hydroxy-5-{1-[4-(2-benzo[b]furanylmethyl)-2(S)-N'-(.tert.-butylcarboxamido)-piperazinyl]}-pentaneamide