Provided is an ascorbic acid derivative that can be used to obtain a glycoside of which ascorbic acid is the aglycone. The abovementioned derivative is the compound represented by formula (A) (i.e., 2,3,6-tri-O-acyl-ascorbic acid). (In the formula, R1 indicates an acyl group.)本發明為提供一種對於得到將抗壞血酸作為糖苷配基之配醣體上為有用之抗壞血酸衍生物。上述衍生物為下述式(A)所示化合物(即,2,3,6-三-O-醯基抗壞血酸)。(式中,R1表示醯基)。