Author's Organization:Tokyo College of Pharmacy Research Laboratories, Taisho Pharmaceutical Co., Ltd. Research Laboratories, Taisho Pharmaceutical Co., Ltd. Faculty of Pharmaceutical Sciences, University of Tokyo
A new triterpene named Gilvanol (Ia), C30H50O4, mp 212-215°, which have been elucidated to be hopan-3β-ol-17 (21)-ozonide by chemical evidence and X-ray analysis, was isolated from Quercus gilva BLUME.