and stereodivergent synthesis of two possible diastereomers of (−)-gummiferol was achieved, wherein the stepwise epoxidation and Cadiot–Chodkiewicz reaction were utilized for the construction of the diepoxide moiety and triacetylene part, respectively. Detailed comparison of their 1H and 13C NMR data and specific rotation with those of the natural product unambiguously elucidated the absolute stereostructure