AIDS-071304 AIDS071304 N-tert-Butyl-1-[2'(R)-hydroxy-4'-phenyl-3'(S)-[3''(R)-[1''',1'''-dioxo-2'''(R)-methylethyl]tetrahydrothienyloxycarbonylamino]butyl]-4-[(3'-methoxy-4',5'-methylenedioxyphenyl)methyl]piperazine-2(S)-carboxamide Piperazine-hydroxypropyldiamine deriv.