A.NaOOC-(CHOH)3-COOK B.NaOOC-(CHOH)2-COOK C.NaOOC-(CHOH)5-COOK D.NaOOC-(CHOH)4-COOK
A.碘 B.二氧化硫 C.二水合酒石酸鈉 D.無水乙酸鈉