ON THE OCCURRENCE OF METHYLATED AND METHOXYLATED FLAVONOIDS IN LEPTOSPERMUM-SCOPARIUM

Samples of Leptospermum scoparium, collected from climatically and geo logically different locations, were examined for their external leaf f lavonoids. HPLC fingerprint analyses of dichloromethane extracts revea led different compositions and amounts of methylated and methoxylated flavonoids. In the area of Auckland, Coromandel, Whangaruru North, and Rawhiti plants have been found which possess high amounts of pharmaco logically active 5,7-dimethoxytlavone, 5-hydroxy-7-methoxy-6-methylfla vone, and 5-hydroxy-7-methoxy-6,8-dimethylflavan-3-one. (C) 1998 Elsev ier Science Ltd. All rights reserved.