用外森堡法对海南粗榧内酯收集一套衍射数据,目测估计其强度。用自行设计的适用于DJS-121计算机的多解直接法程序确定了分子结构,R=0.28。此后又用PW-1100四圆衍射仪收集一套衍射强度数据,并引入原子座标和标度因子,按各向同性和各向异性温度因子作全矩阵最小二乘修正,R=0.1099,从差值图上找出了氢原子位置。 A set of diffraction data was collected from Hainan Roughona lactone by the outside Morrison method, and its intensity was estimated visually. The molecular structure was determined by a multi-solution direct method program designed for DJS-121 computer, R = 0.28. After that, a set of diffraction intensity data was collected with a PW-1100 four-circle diffractometer and the atomic coordinates and scaling factors were introduced. The full-matrix least-squares correction was made according to the isotropic and anisotropic temperature factors, R = 0.1099. Difference map to find the hydrogen atom position.