(3S,4S,5S,10S,13R,14R,17R)-4α,14α-Dimeth­yl-3β-tos­yl-5α-cholest-8-ene-7,11-dione

The stereochemistry as well as the absolute configuration of the title compound, C₃₆H₅₂O₅S, were established and confirmed by single-crystal X-ray diffraction.

(3S,5S,10S,13S,14S,17S)-Meth­yl 3β-acet­yl-25,26,27-tris­norlanost-8-en-24-oate

The absolute configuration of the title compound, C₃₀H₄₈O₄, was assigned by reference to a known chiral centre. The conformations of the four fused rings constituting the core of the mol­ecule are comparable to those of some other triterpenes from the same family.

(4S,5S,10S,13R,14R,17R)-8α,9α-Ep­oxy-4α,14α-dimethyl-5α-cholestan-3-one

The stereochemistry of the oxirane bridge of the title compound, C₂₉H₄₈O₂, has been confirmed by single-crystal X-ray diffraction.