Three new hydroquinone glycosides were isolated from the MeOH extract of th
e aerial parts of Phagnalon rupestre. Their structures were elucidated as 1
-O-beta -glucopyranosyl-1,4-dihydroxy-2-(3 ' ,3 ' -dimethylallyl)benzene (1
), 1-O-beta -glucopyranosyl-1,4-dihychoxy-2-(3 ' -hydroxymethyl-3 ' -methyl
allyl)benzene (2), and 1-O-(4 " -O-caffeoyl)-beta -glueopyranosyl-1,4-dihyd
roxy-2-(3 ' ,3 ' -dimethylallyl)benzene (3) by spectroscopic methods.