Abstract
Four new acylated anthocyanins have been isolated from flowers of Ipomoea cairica (L.) Sweet. Pigments I and II were characterized as isomers of cyanidin-3-( p-coumaryl-caffeyl-sophoroside)-5-glucoside, IIIb as cyanidin-3-(dicaffeyl-sophoroside)-5-glucoside and IV as cyanidin-3-(caffeyl-sophoroside)-5-glucoside. Pigment IIIa was identified as cyanidin-3-(dicaffeyl-sophoroside)-5-glucoside, which has been described by Imbert et al. 10 in Ipomoea batatas (L.) Lam. Anthocyanin IIIa is isomeric with IIIb. The presence of acylated pigments in Tubiflorae order is of systematic interest.
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