[Chemical Constituents in Petroleum Ether Extract of Mongolian Medicine Halenia corniculata].

Objective: To study the chemical constituents of Mongolian medicine Halenia corniculata.

Methods: Positive phase and reversed phase silica gel, as well as Sephadex LH-20 methods were used to separate and purify. The structure of the isolated constituents was identified according to the NMR spectroscopy data and the literature data.

[Chemical Constituents from Usnea longgisima, a Traditional Mongolian Medicine(II)].

Objective: To study the chemical constituents of traditional Mongolian medicine Usnea longissima.

Methods: The compounds were isolated and purified by the methods of solvent extraction and chromatographic technique, and their structures were identified on the basis of the analyses of spectral data.

Results: Three compounds were obtained and identified as 4-hydroxy-2-[ (2-hydroxy-4-methoxy-6-methylbenzoyl) oxy]-6-methylbenzoic acid (1), dibutyl phthalate (2) and diisobutyl phthalate (3).