35833-62-6Relevant articles and documents
Complete 1H and 13C NMR spectral assignment of cabraleadiol, a dammarane triterpene from Dysoxylum malabaricum Bedd
Hisham,Ajitha Bai,Fujimoto,Hara,Shimada
, p. 146 - 150 (2007/10/03)
Three dammarane triterpenoids, cabraleone (20S,24S-eopxy-25-hydroxydammaran-3-one), cabraleadiol (20S,24S-epoxydammarane-3α,25-diol) and shoreic acid (20S,24S-epoxy-25-hydroxy-3,4-secodammar-4(28)-en-3-oic acid), were isolated for the first time from the stem bark of Dysoxylum malabaricum Bedd. (Meliaceae). The complete 1H and 13C NMR spectral assignment of one of these compounds, namely cabraleadiol, and its 3-O-acetyl derivative were achieved by 2D NMR spectroscopy and NOE difference spectroscopy. The C-20 and C-24 configurations in these compounds are discussed on the basis of the present NMR spectroscopic data.
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.
