Gracilipene: A heterocyclic seco-trisnor-oleanane from Calophyllum gracilipes (Guttiferae)

Tetrahedron Letters

Volumn 38, Issue 27, 1997, Pages 4783-4786

  Cao, Shu Geng ^a   Sim, Keng Yeow ^a   Goh, Swee Hock ^a   Xue, Feng ^b   Mak, Thomas C W ^b  

^a NATIONAL UNIVERSITY OF SINGAPORE   (Singapore)

^b CHINESE UNIVERSITY OF HONG KONG   (Hong Kong)

Author keywords

[No Author keywords available]

Indexed keywords

BETULIC ACID; FRIEDELIN; LUPEOL; PLANT EXTRACT; SITOSTEROL; SQUALENE; STIGMASTEROL; TRITERPENE DERIVATIVE;

ARTICLE; DRUG IDENTIFICATION; DRUG ISOLATION; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; PHYTOCHEMISTRY; X RAY CRYSTALLOGRAPHY;

EID: 0030975045     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(97)01032-0     Document Type: Article

References (14)

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2. -1 (strong). See Carreiras, M.C.; Rodriguez, B.; Lopez-Garcia, R.E.; Rabanal, R.M. Phytochemistry 1987, 26, 3351-3353.
3. Connolly, J.D.; Hill, R.A. Dictionary of Terpenoids, Chapman & Hall, Cambridge University Press, Cambridge, 1991, Vol. 2, p. 1299.
4. 3): δ 19.6 (q, Me-27), 19.9 (t, Cl), 21.3 (q, Me-26), 23.8 (q, Me-29; t, C2), 26.2 (t, C12), 26.4 (t, C7), 26.8 (t, C6), 28.1 (t, C16), 28.3 (q, Me-25), 28.48 (t, C15), 28.51 (q, Me-28), 30.8 (s, C20), 32.95 (s, C17), 33.5 (q, Me-30), 33.7 (t, C11), 34.79 (t, C21), 36.4 (d, C13), 37.5 (t, C22), 37.8 (t, C19), 40.7 (s, C9), 42.1 (s, C14), 43.2 (d, C18), 43.3 (s, C8), 64.8 (t, C3), 111.8 (s, C10) and 146.6 (s, C5). MS m/z (rel. int.): 384 (18%), 369 (100), 274 (4), 259(3), 231(6), 205(62), 163(74), 149(46), 135(32), 123(30), 109(67) and 95(66).
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