Triterpenoids from Empetrum nigrum var. japonicum / 中草药

ABSTRACT

Objective To study the chemical constituents of the whole herbs of Empetrum nigrum var. japonicum. Methods Compounds were isolated from n-hexane fraction in the methanol extract from the whole herbs of E. nigrum var. japonicum by silica gel column chromatography and HPLC. Their structures were identified by analysis on their spectral data. Results Twelve compounds were isolated and identified as nigrum-3β,21,22-triol (1), 21,22-dihydroxynigrum-3-one (2), 21β-hydroxynigrum-22 (29)-en-3-one (3), acetyl epirfriedelanol (4), friedelin (5), epirfriedelanol (6), friedelanol (7), nigrum-21-en-3-one (8), uvaol (9), 24-methylenecycoartanol (10), β-amyrin (11), and ursonic acid (12). Conclusion Compounds 1—2 are new compounds named as nigrumtriol A and nigrumone B. Compounds 3—7 and 9—11 are isolated from the plants for the first time.