Studies on chemical constituents of Rheum glabricaule.

OBJECTIVE

To study the chemical Constituents in the root of Rheum glabricaule.

METHODS

Compounds were isolated by various column chromatographies with sillica gel. Their structures were identified by spectral analysis (MS, 1HNMR, 13 CNMR) and chemical evidences.

RESULTS

Seven compounds were isolated from this plant, including n-hexacosnic acid (I), palmitic acid (II), daucosterol (III), chrysophanol-8-Me ether (IV), citreorosein (V), chrysophanol 8-O-beta-D-glucopyranoside (VI) and 2,5-dimethyl-7-methoxychromone (VII).

CONCLUSIONS

All above compounds are obtained from this plant for the first time.