如果是一二位的顺反异构比较简单,计算耦合常数配合NOESY就可以. 如果是一三位的较复杂,可以查阅文献 Carlos A. Stortz, Marta S. Maier; Configurational Assignments of Diastereomeric γ-lactones Using vivinal H-H NMR Coupling Constants and Molecular Modelling; J. Chem. Soc., Perkin Trans. 2, 2000, 1832-1836.