2,2'-(2,3-dimethylbutane-2,3-diyl)dipyridine 35061-42-8 InChI=1/C16H20N2/c1-15(2,13-9-5-7-11-17-13)16(3,4)14-10-6-8-12-18-14/h5-12H,1-4H pyridine, 2,2'-(1,1,2,2-tetramethyl-1,2-ethanediyl)bis-