SUMMARY Anthocyanins in boysenberries were extracted and purified by ion‐exchange and paper chromatographic methods. The pigments were identified by R 1 values, sugar moiety, alkaline degradation products of the aglycone, partial acid hydrolysis, and absorption spectra. The major pigments were shown to be cyanidin 3‐mono‐glucoside and cyanidin 3‐diglucoside. Also present were smaller amounts of cyanidin 3‐rhamnoglucoside and cyanidin 3‐rhamnoglucosido‐5‐glucoside.
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Luh et al. (1965) studied this question.