Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0040-4039(97)01032-0
Title: Gracilipene: A heterocyclic seco-trisnor-oleanane from Calophyllum gracilipes (Guttiferae)
Authors: Cao, S.-G.
Sim, K.-Y. 
Goh, S.-H. 
Xue, F.
Mak, T.C.W.
Issue Date: 7-Jul-1997
Source: Cao, S.-G., Sim, K.-Y., Goh, S.-H., Xue, F., Mak, T.C.W. (1997-07-07). Gracilipene: A heterocyclic seco-trisnor-oleanane from Calophyllum gracilipes (Guttiferae). Tetrahedron Letters 38 (27) : 4783-4786. ScholarBank@NUS Repository. https://doi.org/10.1016/S0040-4039(97)01032-0
Abstract: Gracilipene, a novel heterocyclic trisnor-triterpene from the leaves of Calophyllum gracilipes, shows an unprecedented rearranged seco-trisnor-oleanane structure with a dihydropyran ring-A, as determined by NMR spectra and single crystal X-ray analysis. Other known triterpenes isolated include friedelin, lupeol, lupenone, β-sitosterol, stigmasterol, 3β-hydroxy-30-norlupan-20-one, lupane-3β,20-diol, (20R)-3β-hydroxylupan-29-oic acid, betulinic acid and squalene.
Source Title: Tetrahedron Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/76253
ISSN: 00404039
DOI: 10.1016/S0040-4039(97)01032-0
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