期刊
HELVETICA CHIMICA ACTA
卷 93, 期 3, 页码 457-465出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/hlca.200900230
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Four new triterpene glycosides, named oleanazuroside 1 (1), oleanazuroside 2 (2), ursolazuroside 1 (3). and ursolazuroside 2 (4), together with the seven known compounds 5-11, were isolated from the MeOH extract of the aerial parts of Anchusa azuren MILLER var. azurea. Their structures were elucidated by means of spectroscopic evidence (UV, IR, MALDI-MS, and 1D- and 2D-NMR). The radical-scavenging activities against 2,2-diphenyl-1-picrylhydrazyl (DPPH) of the BuOH extract and of 8 and 10 were very strong (Table 5).
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