Anthocyanins from leaf stalks of cassava (Manihot esculenta Crantz)

Abstract

The anthocyanins, cyanidin 3-O-(6’’-O-a-rhamnopyranosyl-b-glucopyranoside) (1) and delphinidin 3-O-(6’’-O-a-rhamnopyranosyl-b-glucopyranoside) (2) isolated from the leaf stalks of cassava (Manihot esculenta Crantz) by a combination of chromatographic techniques, and their structures were elucidated mainly by the use of homo- and heteronuclear magnetic resonance spectroscopy. The relative amounts of 1 and 2 in the extracts were approximately 92 and 4%, respectively. The absolute amount was 124 mg/100 g.