title: 7,7-[Ethane-1,2-diylbis(oxy)]-2-[hydroxy(phenyl)methyl]bicyclo[3.3.1]nonan-3-one.
abstract: In the title compound, C18H22O4, the cyclo-hexane and cyclo-hexa-none rings adopt normal chair and half-chair conformations, respectively. The dioxolane ring is almost planar, with an r.m.s. deviation of 0.094 (3) Å. In the crystal, mol-ecules are connected by O-H⋯O hydrogen bonds, forming 21 helical chains along the a-axis direction. The chains are further connected by C-H⋯O hydrogen bonds.
authors.affiliation: College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.affiliation: College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
authors.forename: Jia Qi
authors.initials: JQ
authors.lastname: Ma
authors.affiliation: College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
authors.forename: Wei Min
authors.initials: WM
authors.lastname: Mo
authors.affiliation: College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
authors.forename: Zhen Lu
authors.initials: ZL
authors.lastname: Shen