The tetracylicditerpenoids occur widely in higher plants and the tetracylicditerpene was referred to as biomarkers of the families of confiers Ent beyerane and ent beyerene were synthesized with steviosid
四环二萜广泛存在于高等植物中,C20四环二萜被认为是针叶树的生物标志物以甜菊甙为原料合成了内贝叶烷、内贝叶