ethyl 2-(7-hydroxy-2-oxochromen-4-yl)acetate

diethoxyphosphorylcyclohexane

methyl 2-ethoxypyridine-3-carboxylate

5,8-dimethoxy-1,2,3,4-tetrahydronaphthalene

4-氯-N,N-二甲基苯磺酰胺