title: Curcumenol from Curcuma zedoaria: a second monoclinic modification.
abstract: The title compound, systematic name 9-isopropyl-idene-2,6-dimethyl-11-oxatricyclo-[6.2.1.0(1,5)]undec-6-en-8-ol, C(15)H(22)O(2), which crystallizes with two mol-ecules of similar conformation in the asymmetric unit, features three fused rings, two of which are five-membered and the third six-membered. Of the two five-membered rings, the one with an O atom has a distinct envelope shape (with the O atom representing the flap). The six-membered ring is also envelope-shaped as it shares a common O atom with the five-membered ring. In the crystal, the two independent mol-ecules are linked by a pair of O-H⋯O hydrogen bonds, generating a dimer.
authors: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: Omer Abdalla
authors: OA
authors: Ahmed Hamdi
authors: Khalijah
authors: K
authors: Awang
authors: A Hamid A
authors: AH
authors: Hadi
authors: Devi Rosmy
authors: DR
authors: Syamsir
authors: Seik Weng
authors: SW
authors: Ng
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677