Robinson P D, Hua D H, Hong Y, Miao S W
Department of Geology, Southern Illinois University, Carbondale 62901.
Acta Crystallogr C. 1992 Aug 15;48 ( Pt 8):1549-51. doi: 10.1107/s0108270192005626.
The title compound contains the tetracyclic A-B-C-E ring system of cephalotaxus alkaloids. Unexpectedly, the five-membered-ring plane is twisted 67.2 degrees from the aromatic ring plane and, like cephalotaxine, the seven-membered ring is oriented in a boat form with the nitrogen at the prow.
标题化合物包含三尖杉生物碱的四环A - B - C - E环系。出乎意料的是，五元环平面相对于芳香环平面扭转了67.2度，并且与三尖杉宁碱一样，七元环呈船式构象，氮原子位于船头。
