D. Schirlin et al., BENEFICIAL REPLACEMENT OF THE P-1 PHENYLALANINE SIDE-CHAIN IN HIV-1 PROTEASE INHIBITORS OF THE DIFLUOROSTATONE TYPE, Bioorganic & medicinal chemistry letters, 4(2), 1994, pp. 241-246
An O-benzyltyrosyl P-1 side chain on HIV-1 protease inhibitors of the
difluorostatone type confers increased potency and an improved cytotox
ic index in infected cells. A number of carboxy or amino termini modif
ications are permitted for instance, carboxy termini tertiary amides.