乙酰丙酸甲酯

乙酸酐

2-Benzyl-2-phenyl-4,5-dicarbomethoxy-1,3-dithiol

dimethyl 2-phenyl-2-(1-phenylallyl)-1,3-dithiole-4,5-dicarboxylate

dimethyl 2-cinnamyl-2-phenyl-1,3-dithiole-4,5-dicarboxylate