Phenolic compounds from Selaginella moellendorfii.

Chemical investigation of the leaves and roots of Selaginella moellendorfii Hieron has resulted in the isolation and characterization of two new flavone glucosides, 7-O-(β-glucopyranosyl(1→2)-[β-glucopyranosyl(1→6)]-β-glucopyranosyl)flavone-3',4',5,7-tetraol (1) and 7-O-(β-glucopyranosyl(1→2)-[β-glucopyranosyl(1→6)]-β-glucopyranosyl)flavone-4',5,7-triol (2), two new biflavonoids, 2,3-dihydroflavone-5,7,4'-triol-(3'→8″)-flavone-5″,6″,7″,4'''-tetraol (3) and 6-methylflavone-5,7,4'-triol-(3'→O→4''')-6″-methylflavone-5″,7″-diol (4), two new lignans, (7'E)-3,5,3',5'-tetramethoxy-8 : 4'-oxyneolign-7'-ene-4,9,9'-triol (5) and 3,3'-dimethoxylign-8'-ene-4,4',9-triol (6), together with two known monolignans, four known lignans, and four known biflavonoids. Their structures were established by spectroscopic means and by comparison with literature values. 2011 Verlag Helvetica Chimica Acta AG, Zürich.