TANNINS AND RELATED POLYPHENOLS OF EUPHORBIACEOUS PLANTS .12. EUPHORBIN-G AND EUPHORBIN-H, NEW DIMERIC HYDROLYZABLE TANNINS FROM EUPHORBIA-PROSTRATA AND EUPHORBIA-MAKINOI
T. Yoshida et al., TANNINS AND RELATED POLYPHENOLS OF EUPHORBIACEOUS PLANTS .12. EUPHORBIN-G AND EUPHORBIN-H, NEW DIMERIC HYDROLYZABLE TANNINS FROM EUPHORBIA-PROSTRATA AND EUPHORBIA-MAKINOI, Chemical and Pharmaceutical Bulletin, 42(10), 1994, pp. 2005-2010
Two new ellagitannin dimers, euphorbins G (20) and H (21), together wi
th 12 known polyphenols, were isolated from the leaves of Euphorbia pr
ostrata (E. chamaesyce). Their structures, having C-1(4) and C-4(1) gl
ucopyranose cores in each molecule, were established by spectroscopic
and chemical methods. These new dimers, and 13 known hydrolyzable tann
ins, among which six are the same as those from E. prostrata, were als
o isolated from E. makinoi.