ethyl 2-methylpyrazolo[1,5-a]pyrimidine-3-carboxylate

2,4,6,8-tetrazabicyclo[3.3.1]nonane-3,7-dione

2,2'-亚甲基二[1,3-二氧戊环]

3-甲氧基丙烯醛

(Z)-1,3,3-三乙氧基丙-1-烯