From the tubers of Pleione bulbocodioides, two novel bibenzyl glucosides, together with their known aglycones, batatasin III and 3'-O-methylbatatasin III, were isolated. The new glycosides were 3'-hydroxy-5-methoxybibenzyl-3-O-beta-D-glucopyranoside and 3',5-dimethoxybibenzyl-3-O-beta-D-glucopyranoside on the basis of their spectroscopic data. Copyright (C) 1997 Elsevier Science Ltd.