Linagliptin-13C,d3 is the 13C- and deuterium labeled Linagliptin. Linagliptin is a highly potent, selective DPP-4 inhibitor with IC50 of 1 nM. Linagliptin-13C,d3 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.