1-benzyl-1,2,5,6-tetrahydropyridin-3-ylboronic acid pinacol ester; 1-benzyl-5-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine; 1-Benzyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl); 1-benzyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-2H-pyridine;