2-[1,1-bis(pyridin-2-ylmethyl)prop-2-yn-1-yl]pyridine InChI=1/C20H17N3/c1-2-20(19-11-5-8-14-23-19,15-17-9-3-6-12-21-17)16-18-10-4-7-13-22-18/h1,3-14H,15-16H pyridine, 2,2',2''-(2-ethynyl-1,2,3-propanetriyl)tris-