(2S)-1-((1S)-1-{3-Methyl-2-[(phenylmethoxy)carbonylamino]butanoylamino}-2-phenylethyl)-2-{3-methyl-2-[(phenylmethoxy)carbonylamino]butanoylamino}-3-phenylpropyl [5-(5-methyl-2,4-dioxo(1,3-dihydropyrimidinyl))(2-2,5-dihydrofuryl)]methyl butane-1,4-dioate A74704 analog AIDS-085038 AIDS085038