[Chemical Composition of n-Butanol Fraction from Polygonum amplexicaule var. sinense].

OBJECTIVE

To study chemical composition of n-butanol fraction from Polygonoum amplexicaule var. sinense.

METHODS

TLC,normal-phase silica gel, reveres-phase silica gel, Sephadex-LH and semi-preparative HPLC were used to isolate chemical compositions of n-butanol fraction from Polygonoum amplexicaule var. sinense.

RESULTS

Nine compounds were identified as: caffeic acid n-butly ester (1), p-methoxy benzoic acid propyl ester (2),p-E-coumarin quinic acid methyl ester (3),p-Z-coumarin quinic acid methyl ester (4), ethyl ferulate (5), cinchonain I a (6), cinchonain Ib (7), methyl chlorogenate(8), and 6-O-β-D-caffeoylglucose (9).

CONCLUSIONS

All compounds are isolated from this genus for the first time.