Tetrahedron Letters p. 6055 - 6058 (1989)
Update date:2022-07-30
Topics:
Kondo, Tadao
Yamashiki, Junko
Kawahori, Kiyoko
Goto, Toshio
Structure of lobelinin A and B obtained from bluish violet petals of Lobelia erinus have been determinated to be 3-coumarylrutinosyl-5-malonyl-glucosyl-3',5'-di(caffeylglucosyl)delphinidin and 3-coumarylrutinosyl-5-malonylglucosyl-3'-caffeylglucosyl-5'-ferulylglucosyldelphinidin.These pigments are stable in neutral aqueous solutions possibly by intramolecular sandwich type stacking.
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