[Screening of anti-diarrhea effective fractions from guava leaf].
Parole chiave
Astratto
OBJECTIVE
To screen the fractions from guava leaf to ascertain the effective anti-diarrhea fraction and to establish the method of quality control.
METHODS
A series of samples from guava leaf were prepared through extraction and separation by solvents progressively, and their effect on the mice diarrhea models induced by senna decoction were tested individually; and the constituent correlated with the effect of the samples on the models was determined by HPLC.
RESULTS
The effect of the fractions with moderate-polar glucosides from guava leaf was better than that of the other fractions; the effect of the fractions with the glucosides was correlated with the content of the quercetin glucosides in the fractions.
CONCLUSIONS
The fractions with the moderate-polar glucosides is the effective anti-diarrhea fraction of guava leaf; determination of the quercetin glucosides can be used for quality control of guava leaf and its extracts.
