2-异氰基-N,N-二甲基-乙酰胺

5-二乙氧基甲基咪唑-4-羧酸甲酯

methyl 5-thiophen-2-yl-1,3-oxazole-4-carboxylate

methyl 3-ethyl-2-formamidopent-2-enoate

methyl 5-(furan-3-yl)-1,3-oxazole-4-carboxylate