Studies on Tannins of the Bark of Macaranga tanarius (L.) Muell. et Arg.

JER-HUEI LIN

National Laboratories of Foods and Drugs,Department of Health, Executive Yuan

ABSTRACT

   Chemical examination of the bark of Macaranga tanarius (L.) Muell. et Arg. (Euphorbiaceae) has led to the isolation of 10 known tannins(l-l0). These tannins are corilagin (1), mallotinic acid(2), geraniin(3), marcarinin A (4), putranjivain B(5), putranjivain A(6), mallotunin(7), mallophilinin (8), repandusinic acid A(9) and phyllanthusiin C(10). These structures were identified on the basis of their physical properties and spectroscopic evidences.

Key words: Macaranga tanavius, Euphorbiaceae, Hydrolyzable tannin.