Yoshida T, Chou T, Nitta A, Miyamoto K, Koshiura R, Okuda T
Faculty of Pharmaceutical Sciences, Okayama University, Japan.
Chem Pharm Bull (Tokyo). 1990 May;38(5):1211-7. doi: 10.1248/cpb.38.1211.
Three new dimeric hydrolyzable tannins, woodfordins A, B and C, along with seven known hydrolyzable tannins, including oenothein B, a dimer exhibiting marked host-mediated antitumor activity, were isolated from an Indonesian crude drug, Sidowayah [dried flowers of Woodfordia fruticosa (L.) Kurz (Lythraceae)]. The structures of the new tannins were elucidated based on chemical and spectral evidence. Woodfordin C, having a macro-ring structure, was also found to exhibit a significant antitumor activity.
