[A new bibenzyl derivative from Bletilla striata].

OBJECTIVE

To study the chemical constituents of Bletilla striata.

METHODS

Various column chromatographies with silica gel and Sephadex LH-20 were employed for the isolation and purification. The structures of the compounds were elucidated on the basis of spectral analyses and chemical methods.

RESULTS

Three compounds were isolated from the roots of Bletilla striata (Thunb.) Reichb. f. and identified as 5-hydroxy-4-(p-hydroxybenzyl)-3'-3-dimethoxybibenzyl (I), schizandrin (II), 4,4'-dimethoxy-(1,1'-biphenanthrene)-2,2',7,7'-tetrol (III).

CONCLUSIONS

Compound I is a new bibenzyl derivative and II was isolated from this plant for the first time.