Flavonols and an indole alkaloid skeleton bearing identical acylated glycosidic groups from yellow petals of Papaver nudicaule

The nudicaulins from yellow petals of Iceland poppy consist of four pairs of isomeric glycosidic compounds differing in the malonylation pattern. The structure of a pentacyclic indole akaloid skeleton was proposed for the aglyca of the major nudicaulins VII and VIII by combining 2D NMR, MS and CD data. In addition, kaempferol derivatives having identical acylated glycoside moieties were identified.