3-ethoxycarbonyl-1H-pyrrole-2-carboxylate

ethyl 2-(2-ethoxy-2-oxoethyl)-3H-1,3-benzothiazole-2-carboxylate

triethyl 5-methyl-1H-pyrrole-2,3,4-tricarboxylate

1,2,3-噻二唑-4,5-二甲酸

二氧化三碳