Four New Triterpenes fromAnchusa azureavar.azurea

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 azurea 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...