title: (20S)-20-Acet-oxy-4-pregnene-3,16-dione from Commiphora wightii.
abstract: The title triterpene compound, C(23)H(32)O(4), isolated from Commiphora wightii features four trans-fused rings, among which the five-membered ring adopts an envelope conformation, the cyclo-hexene ring adopts a half-chair conformation and the two cyclo-hexane rings exist in chair conformations. The asymmetric unit contains two independent mol-ecules. Weak inter-molecular C-H⋯O hydrogen bonding is present in the crystal structure.
authors: Sammer
authors: S
authors: Yousuf
authors: Rida
authors: R
authors: Ahmed
authors: Zulfiqar
authors: Z
authors: Ali
authors: M Iqbal
authors: MI
authors: Choudhary
authors: Seik Weng
authors: SW
authors: Ng
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