In the course of our studies on the development of anti-acquired immun
odeficiency syndrome (AIDS) agents, we isolated corilagin, quercetin 3
-O-beta-D-glucopyranoside and 1,3,4,6-tetra-O-galloyl-beta-D-glucopyra
nos from Chamaesyce hyssopifolia, as the main inhibitory substances ag
ainst human immunodeficiency virus (HIV) reverse transcriptase, an enz
yme essential for the proliferation of HIV. The IC50 of these substanc
es were 20, 50 and 86 mu M, respectively, their modes of inhibition be
ing non-competitive with respect to the substrate. (C) 1997 by John Wi
ley & Sons, Ltd.