Chemical conversion of (4S,5S)-(+)-germacrone 4,5-epoxide, a plausible biogenetic intermediate found in the essential oil of Zedoariae rhizoma from Yakushima, Japan - Yoshihara,M.; Yang,C.; Zheng,C.; Shibuya,H.; Hamamoto,Y.; Tanaka,N.; Kitagawa,I. (Chemical and Pharmaceutical Bulletin, 1986)