具有Scalarane碳架的二倍半萜以及C-20甲基化或C-20和C-24双甲基化的Scalarane型高二萜半萜是Dictyoceratida科海绵的典型代谢产物。海绵Phyllospongia foliascens属Dictyoceratida科,从这种海绵中我们已分离和测定了7种双高二倍半萜的结构,作为对这种海绵深入研究的一部分,我们对采自西沙和南沙群岛的同种海绵进行了研究,从中得到Acetoxy phyllofoldctone A(1).本文报道(1)的分离及结构测定. Sesquiterpenes with Scalarane carbofuran and Scalarane diterpene, C-20 methylated or C-20 and C-24 dimethylated, are typical metabolites of the Dictyoceratida sponge. The sponge Phyllospongia foliascens belong to the family Dictyoceratida. From this sponge we have isolated and determined the structure of seven double sesquiterpenoids. As part of an in-depth study of this sponge, we examined the same sponge collected from the Xisha and Nansha Islands Acetoxy phyllofoldctone A (1) was obtained from this study.The isolation and structure determination of (1) were reported in this paper.