(C6H10O5)n(淀粉)可以写成[C6H7O2(OH)3 ]n
[C6H7O2(OH)3]n + 3nCH3COOH ---->(催化剂:乙酸酐)
[C6H7O2(OOCCH3)3]n (淀粉醋酸酯)+ 3nH2O