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Four New Triterpenes from Anchusa azurea var. azurea
Authors:Aye Kuruüzüm‐Uz  Zuhal Güvenalp  Cavit Kazaz  Bekir Salih  L&#x; mür Demirezer
Abstract: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 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) of the BuOH extract and of 8 and 10 were very strong (Table 5).
Keywords:Anchusa azurea var  azurea  Triterpene glycosides  Oleanazurosides 1 and 2  Ursolazurosides 1 and 2  Radical‐scavenging activity  Glycosides
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