Among these
the crambine3 and batzelladine alkaloids4 were found to be potent
HIVgp-120-CD4 inhibitors. The scope of this pharmacophore has
been increased further by the identification of the 4-(3-hydroxyphenyl)-
2-thione derivative (±)-4i called monastol,6 as a novel
cell-permeable lead molecule for the development of anticancer
drugs.