Miranda R R S, Silva G D F, Duarte L P, Fortes I C P, Filho S A Vieira
Neplam--Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil.
Magn Reson Chem. 2006 Feb;44(2):127-31. doi: 10.1002/mrc.1734.
Six pentacyclic triterpenoids, 3beta-stearyloxy-urs-12-ene (1), friedelin (2), 3beta-friedelinol (3), alpha-amyrin (4), beta-amyrin (5), and lupeol (6), have been isolated from the hexane extract of Maytenus salicifolia Reissek (Celastraceae) leaves. The molecular and structural formula as well as the stereochemistry of a new pentacyclic triterpene (1) were determined using data obtained from 1H and 13C NMR spectra, DEPT135 and by 2D HSQC, HMBC, COSY and NOESY experiments. The molecular formula C48H84O2 was established using quantitative 13C NMR, and the molecular weight (692 Da) was confirmed by elemental analysis and mass spectrometry (GC-MS).
从杨柳叶美登木（卫矛科）的己烷提取物中分离出六种五环三萜类化合物，即3β-硬脂酰氧基-乌苏-12-烯（1）、木栓酮（2）、3β-木栓醇（3）、α-香树脂醇（4）、β-香树脂醇（5）和羽扇豆醇（6）。利用从1H和13C NMR光谱、DEPT135以及二维HSQC、HMBC、COSY和NOESY实验获得的数据，确定了一种新的五环三萜（1）的分子式、结构式以及立体化学。通过定量13C NMR确定分子式为C48H84O2，并通过元素分析和质谱（GC-MS）确认分子量（692 Da）。
