Journal Article
Mumic acids A–E: new diterpenoids from mumiyo
Yuko Kiren; Alfarius Eko Nugroho; Yusuke Hirasawa; Osamu Shirota; Myrzaim Bekenova; Narbekov Omorbay Narbekovich; Marina Shapilova; Hiromichi Maeno; Hiroshi Morita
Journal of Natural Medicines · Vol. 68, Issue 1 · pp. 199-205 · 2014
Abstract
Five new diterpenoids belonging to labdane and isopimarane skeletons, mumic acids A–E ( 1 – 5 ), have been isolated from mumiyo . Their structures and absolute configurations were elucidated on the basis of spectroscopic data and chemical derivatization.