Abstract
The anthocyanin of Spirodela oligorrhiza is not cyanin. Its behavior in paper chromatography and partition between solvents, and the effect of aluminum chloride on its absorption spectrum indicate that it does not possess vicinal hydroxyl groups in the 2-aryl ring, but bears a polyhydroxylated nuclear substituent. The flavone constituents and the anthocyanin of the plant appear to be structurally closely related.
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