Isomaltase is an enzyme that breaks the bonds linking saccharides, which cannot be broken by amylase or maltase. Wikipedia

Oligo-1,6-glucosidase is a glucosidase enzyme located on the brush border of the small intestine, which catalyses the following reaction: Hydrolysis of -α-D-glucosidic linkages in some oligosaccharides produced from starch and glycogen by EC 3.2.1.1, and in isomaltoseIt is a dual-function enzyme with two GH31 domains, one serving as the isomaltase, the other as a sucrose alpha-glucosidase. Wikipedia

Catalysis of the hydrolysis of -alpha-D-glucosidic linkages in some oligosaccharides produced from starch and glycogen by alpha-amylase, and in isomaltose. Releases a free alpha-D-glucose. Wikidata

An enzyme that catalyzes the hydrolysis of isomaltose and related dextrins. Wiktionary