pentacyclic triterpane五环三萜烷
Pentacyclic Triterpenes五环三萜类
pentacyclic triterpenoid五环三萜类化合物;五环三萜
pentacyclic ring五环
pentacyclic hydrocarbons五环烃
pentacyclic compound五环化合物
pentacyclic flower五轮花
pentacyclic graphs五圈图
pentacyclic hydrocarbon五环烃