Two new kaempferol glycosides (1 and 2) were isolated from the blue flowers of Nigella damascena cv 'Ms Jekyll Blue' along with a known anthocyanin (3).The structures of 1 and 2 were elucidated by application of chemical and spectroscopic methods.Compound (3) was a rarely observed anthocyanin in plants.
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Toki et al. (2009) studied this question.
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