63867-72-1 BRN 0391925 Piperidine, 3,4-didehydro-4-(3-(dimethylamino)propyl)-1,2,2,6,6-pentamethyl- Pyridine, 1,2,3,6-tetrahydro-4-(3-(dimethylamino)propyl)-1,2,2,6,6-pentamethyl-