Two new flavonoids, (2S)‐4′,5‐dihydroxyl‐6,7‐di‐O‐β‐D‐glucopyranosyl flavanone (1) and 6‐hydroxykaempferol 6,7‐di‐O‐β‐D‐glucopyranoside (2), were isolated from Carthamus tinctorius. Their structures were elucidated by spectroscopic means including 2D NMR, ESIMS and CD.
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Feng et al. (2002) studied this question.
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