title: Maleopimaric acid acetic acid solvate.
abstract: The title compound, C(24)H(32)O(5)·C(2)H(4)O(2), is a derivative of abietic acid. The two fused and unbridged cyclo-hexane rings have chair conformations and the anhydride ring is planar. Of the other three six-membered rings, two have boat conformations and one has a twist-boat conformation. The crystal structure is stabilized by inter-molecular O-H⋯O and C-H⋯O hydrogen bonds.
authors.affiliation: Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, 210042, People's Republic of China.
authors.forename: Meng
authors.initials: M
authors.lastname: Zhang
authors.forename: Yong-Hong
authors.initials: YH
authors.lastname: Zhou
authors.forename: Xiao-Xin
authors.initials: XX
authors.lastname: Guo
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Hu