title: 9-Isopropenyl-4-methyl-2H-thieno[2,3-h]chromen-2-one.
abstract: The title compound, C(15)H(12)O(2)S, features three fused rings with a dihedral angle of 79.6 (2)° between the isopropenyl group and the thio-phene ring. In the crystal, mol-ecules are connected into a supra-molecular helical chain via C-H⋯O contacts.
authors.affiliation: Department of Medicinal Chemistry, School of Pharmacy, Fudan University, Shanghai 200032, People's Republic of China.
authors.forename: Shiqing
authors.initials: S
authors.lastname: Xu
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
authors.forename: Peng
authors.initials: P
authors.lastname: Xia