67253-01-4Relevant articles and documents
A pregnane steroid from Aglaia lawii and structure confirmation of cabraleadiol monoacetate by X-ray crystallography
Qiu, Sheng-Xiang,Van Hung, Nguyen,Xuan, Le Thi,Gu, Jian-Qiao,Lobkovsky, Emil,Khanh, Tran Cong,Soejarto, Djaja D.,Clardy, Jon,Pezzuto, John M.,Dong, Yumi,Tri, Mai Van,Huong, Le Mai,Fong, Harry H.S.
, p. 775 - 780 (2001)
The pregnane steroid, (E)-aglawone, along with four known triterpenes, and a known sterol mixture were isolated from the bark of Aglaia lawii (Wight) Saldanha ex Ramamoorty (Meliaceae). The structural determination/identification was accomplished by a combination of 1D- and 2D-NMR spectroscopic techniques. The relative stereochemistry of the known triterpene, 20S,24S-epoxydammarane-3α, 25-diol acetate, was also unequivocally determined for the first time by X-ray crystallography. The isolates were not active against various human cancer cell lines.
TRITERPENOIDS FROM THE LEAVES OF Betula lanata
Pokhilo, N. D.,Malinovskaya, G. V.,Makhan'kov, V. V.,Anufriev, V. F.,Uvarova, N. I.
, p. 368 - 372 (2007/10/02)
From the unsaponifiable fraction of an ethereal extract of the leaves of Betula lanata, in addition to 3-epiocotillol (I) we have isolated a new triterpene, 20(S),24(R)-epoxydammarane-3α,11α,25-triol (V) and also derivatives of it - the monoacetates at C-3 (II) and C-11 (III), and the monoketone at C-3 (IV).The structures of compounds (I-V) have been established on the basis of the results of physicochemical investigations.
