title: 4-Hydr-oxy-3-mesityl-1-oxaspiro-[4.4]non-3-en-2-one.
abstract: In the title compound, C(17)H(20)O(3), the five-membered cyclo-pentyl ring displays an envelope conformation, with the atom at the flap position 0.538 (3) Å out of the mean plane formed by the other four atoms. The dihedral angle between the benzene and furan rings is 63.34 (15)°. In the crystal structure, mol-ecules are linked through inter-molecular O-H⋯O hydrogen bonds, forming a zigzag chain along [101].
authors.forename: Jin-Hao
authors.initials: JH
authors.lastname: Zhao
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhou
authors.forename: Guo-Nian
authors.initials: GN
authors.lastname: Zhu
authors.forename: Jing-Li
authors.initials: JL
authors.lastname: Cheng