title: 3β-Acet-oxy-12-oxoolean-28-oic acid benzyl ester.
abstract: The mol-ecule of title compound, C(39)H(56)O(5), contains five fused six-membered rings, four of which (rings A, B, D and E) adopt a chair conformation, while the other (ring C) has a half chair conformation. The acet-oxy and carb-oxy-benzyl groups occupy equatorial positions.
authors.forename: Jun-Yi
authors.initials: JY
authors.lastname: Hu
authors.forename: Ying-Qian
authors.initials: YQ
authors.lastname: Xu
authors.forename: Guo-Bo
authors.initials: GB
authors.lastname: Xu
authors.forename: Kang
authors.initials: K
authors.lastname: Wang
authors.forename: Peng
authors.initials: P
authors.lastname: Lei