Menthol was obtained from lemon eucalyptus oil via cyclization and catalytic hydrogenation .

以柠檬桉叶油为主要原料经环化、催化氢化二步反应得到薄荷醇。

Using acyclovir as raw material , two novel tricyclic derivatives of guanine analogue were synthesized through the reaction of cyclization , esterification and alkylation .

以无环鸟苷为原料，经过环化反应、酯化反应和烷基化反应，合成了2种新型三环嘌呤类衍生物。