Loong Xe Min, Mohamad Khalit, Awang Khalijah, A Hadi A Hamid, Ng Seik Weng
Acta Crystallogr Sect E Struct Rep Online. 2010 Sep 11;66(Pt 10):o2541. doi: 10.1107/S1600536810035208.
Cabraleahy-droxy-lactone, C(27)H(44)O(3), isolated from the leaves of Aglaia exima, has three six-membered rings fused together that adopt chair conformations. Its two five-membered rings are enveloped shaped. The hy-droxy group is in an axial position. It is a hydrogen-bond donor to the carbonyl O atom of an adjacent mol-ecule; the O-H⋯O inter-actions lead to the formation of a helical chain that runs along the b axis. There are two independent mol-ecules in the asymmetric unit.
从埃氏米仔兰（Aglaia exima）叶片中分离得到的卡布拉莱羟基内酯，化学式为C(27)H(44)O(3)，有三个稠合在一起的六元环，均呈椅式构象。它的两个五元环呈信封状。羟基处于轴向位置。它是相邻分子羰基O原子的氢键供体；O-H⋯O相互作用导致形成沿b轴延伸的螺旋链。不对称单元中有两个独立的分子。
