Indophenol-substituerede maltooligosider som alfa-amylasesubstrater

The invention relates to indophenyl-substituted maltose derivatives, to the use thereof for determining the enzymatic activity of alpha -amylase, and to reagents for alpha -amylase determination which contain the indophenyl-induced maltose derivatives as enzyme substrate. in which Gluc is a glucose molecule, and the indophenol residue is linked in the alpha position to the sugar, n = 1 or 2, X, Y = independently of one another H, a halogen (F, Cl, Br), nitro, acetamido or cyano group, a sulphonic acid, sulphinic acid or carboxylic acid group, as well as corresponding acid alkyl ester and acid amide groups, a straight-chain or branched, optionally substituted alkyl group with 1 to 6 C atoms, an optionally substituted cycloalkyl group with 3 to 6 C atoms or an optionally substituted aryl group, with the proviso that X and Y are not both H.