Studies on Tannins from the Bark of Macaranga sinensis (Baill,) Muell,-Arg.

JER-HUEI LIN

National Laboratories of Foods and Drugs, Departement of Health, Executive Yuan.
161-2, Kuen Yang Street, Nan Kang, Taipei, Taiwan, R.O.C.

ABSTRACT

   Together with twelve known compounds--brevifolincarboxylic acid(l), corilagin(2), tercatain(3), mallorepanin(4), furosin(5), geraniin(6), macarinin A(7), chebulagic acid(8), macarinin B(9), putranjivain A(1O), phyllanthusiin C(11), bixanin(l2), a new hydrolyzable tannin, 1-0-galloyl- 2,4-(4-hydroxychebuloyl)-3,6-(R)-HHDP-β-D-glucopyranose(l3) was isolated from the bark of Macaranga sinensis (Baill.) Muell.-Arg, (Euphorbiaceae). Structures of these tannins were established on the basis of their physical properties and spectroscopic evidence.

Key Words: Macaranga sinensis, Euphorbiaceae, Hydrolyzable tannin.