Abstract
The novel flavonol 8-methoxykaempferol 3- O-(2″-β- d-glucopyranosyl-β- d-glucopyranoside) has been found as a yellow pigment in almond pollen. In addition, trace amounts of kaempferol and quercetin 3-diglucosides have been detected. These compounds have been isolated from almond bee pollen, which is a convenient source for the study of flavonoids from natural pollen. HPLC studies show no differences in the flavonoid patterns of pollen and bee pollen, and demonstrate that 8-methoxykaempferol 3-sophoroside is the main flavonoid in almond pollen, while other flower and leaf tissues are devoid of this pigment. This compound is also absent from other botanically related pollens (plum, apple, cherry, and pear).
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