organic compounds
The title compound, C21H29BrO3, is a steroid used as an intermediate in medicine. The asymmetric unit consists of two molecules and the structure contains intermolecular hydrogen bonds.
organic compounds
The title compound, C21H26O4, is an important steroid used as an intermediate in the synthesis of hormone pharmaceuticals. No inter- or intramolecular hydrogen bonds were observed in the crystal structure.
organic compounds
The title compound, C21H29BrO3·CH3OH, is a steroid and an intermediate for medicinal applications. It is prepared through the reaction of 16,17-epoxypregn-4-ene-3,20-dione and HBr, and the methanol solvate is reported here. The space group is and is different from the space group of 16β-bromo-17α-hydroxypregn-4-ene-3,20-dione which is C2 [Wang, Wang, Nie, Xiang & Zhou (2005). Acta Cryst. E61, o1–o2].
organic compounds
The title compound, C28H34O6S, is an important intermediate in the synthesis of hormone pharmaceuticals. In the crystal structure, the asymmetric unit consists of two molecules.
organic compounds
The title compound, C18H12O3, also known as tanshinone, contains four fused rings. The crystal packing involves offset π-stacking interactions and C—HO hydrogen bonds.