methyl 3’-hydroxybiphenyl-2-carboxylate

4-羟基-[1,1-联苯]-2-羧酸甲酯

ethyl 4-oxocyclohex-2-enecarboxylate

ethyl 4-oxocyclohexene-1-carboxylate

methyl 1,4-dioxaspiro[4.5]dec-7-ene-8-carboxylate