title: 2'-Methyl-pyrazolo[4',3':16,17]androst-5-en-3β-ol.
abstract: In the title compound, C(21)H(30)N(2)O, there are five fused rings. The A and C rings adopt chair conformations, ring B adopts an 8β,9α-half-chair conformation and ring D adopts a 14α-envelope conformation. The pyrazole ring is planar. Inter-molecular O-H⋯N hydrogen bonds [H⋯N = 1.88 (5) Å] help to stabilize the crystal structure. The absolute structure was deduced from those of the starting materials.
authors.affiliation: Department of Medicinal Chemistry, School of Pharmacy, Fudan University, 138 Yixueyuan Road Shanghai 200032, People's Republic of China.
authors.forename: Hu-Ling
authors.initials: HL
authors.lastname: Zheng
authors.forename: Peng
authors.initials: P
authors.lastname: Xia
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen