1-Methyl-4-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)pyrazol-1-yl]piperidine-d3 is the isotope labelled analog of 1-Methyl-4-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)pyrazol-1-yl]piperidine (M330220); a compound used in the synthesis of a series of hydroxybenzoxazole derivatives as c-Met kinase inhibitors.