[Studies on chemical constituents from Ipomoea batatas].

OBJECTIVE

To investigate the chemical constituents of Ipomoea batatas.

METHODS

Silica gel column chromatography and Sephadex LH-20 were used to separate and purify the compounds from the EtOAc and n-BuOH soluble fraction of ethanol extracts. The chemical structures were elucidated on the basis of physic-chemical properties and spectral data.

RESULTS

Four compounds were isolated and identify as citrusin C (1), caffeicacid (2), 3,4-di-O-caffeoylquinic acid (3), 1,2,3,4-tetrahydro-beta-carboline-3-carboylic acid (4).

CONCLUSIONS

Compounds 1-4 are isolated for the first time from I. batatas.