Mohd. Sirat, Hasnah and Y. S., Feng and K., Awang and S. W., Ng (2010) [1R-(1 alpha,2 alpha,4 alpha,5 beta,6 alpha,7 alpha)]-4-Benzoyloxymethyl-5,6-dihydroxy-3,8-ioxatricyclo[126.96.36.199(2,4)]octan-5-yl acetate (3-deacetylcrotepoxide) from Kaempferia rotunda Val. Acta Crystallographica Section E-Structure Reports Online, 66 (n/a). O2945-U1324. ISSN 1600-5368
Official URL: http://dx.doi.org/10.1107/S1600536810042686
The title compound, C16H16O7, isolated from Kaempferia rotunda rhizomes, features a six-membered cyclohexane ring that adopts a twisted-boat conformation owing to the presence of two adjacent epoxide attachments that lock in four of the six axial positions. The CH3CO2- and HO- substituents occupy equatorial positions. However, the bond angles at the ring carbon connected to the C6H5CO2CH2- substituent deviate signifcantly from the idealized tetrahedral angles as the carbon atom is part of an epoxide ring. In the crystal, the molecules are linked into chains by O-HO hydrogen bonds.
|Deposited By:||Liza Porijo|
|Deposited On:||24 Jul 2012 02:20|
|Last Modified:||24 Jul 2012 02:23|
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