A new bibenzyl derivative from Bletilla striata / 药学学报

<p><b>AIM</b>To study the chemical constituents of Bletilla striata.</p><p><b>METHODS</b>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.</p><p><b>RESULTS</b>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).</p><p><b>CONCLUSION</b>Compound I is a new bibenzyl derivative and II was isolated from this plant for the first time.</p>