- Cytotoxic hydrolyzable tannins from Balanophora japonica.
Cytotoxic hydrolyzable tannins from Balanophora japonica.
Journal of natural products (2008-02-28)
Zhi-Hong Jiang, Xiao-Yun Wen, Takashi Tanaka, Shao-Yu Wu, Zhongqiu Liu, Hiromi Iwata, Yoko Hirose, Shuguang Wu, Isao Kouno
PMID18302336
ABSTRACT
Four hydrolyzable tannins named balanophotannins D-G ( 1- 4) were isolated from the aerial parts of the parasitic plant Balanophora japonica. Their structures were characterized on the basis of spectroscopic and chemical evidence. Balanophotannins D-G contain an oxidized hexahydroxydiphenoyl (HHDP) group. The absolute configurations of balanophotannins D ( 1) and F ( 3) were determined via the PGME method. Balanophotannin E ( 2) showed cytotoxicity to Hep G2 cancer cells with an IC 50 value of 4.22 microM.