1-Butyl-3,5-diethyl-1,2-dihydro-2-propylpyridine 3,5-Diethyl-2-propyl-1-butyl-1,2-dihydropyridine 63789-05-9 EINECS 264-462-7 Pyridine, 1-butyl-3,5-diethyl-1,2-dihydro-2-propyl-