Acylated Anthocyanins from Flowers of Cineraria, Senecio cruentus, Red Cultivar

Cinerarin, the anthocyanin isolated from the blue flowers of garden cineraria, S. cruentus by Yoshitama et al. [1, 2], was identified as dicaffeylated delphinidin 3,7,3'-triglucoside on the basis of the chemical evidences and its extraordinary sta­ bility in a neutral aqueous solution was also point­ ed out. Goto et al. [3] established its complete structure as malonyltricaffeyl delphinidin-tetraglucoside mainly by means of N M R methods. On the other hand, Yoshitama et al. [4, 5] character­ ized the red pigment, named rubrocinerarin, from the cineraria red cultivar flowers, and tentatively determined its structure as cyanidin analogue of cinerarin with the same substituents.