101418-92-2 3,3-DM-Mpdp 3,3-Dimethyl-MPDP 4-Phenyl-1,3,3-trimethyl-2,3-dihydropyridinium 4-Phenyl-1,3,3-trimethyl-2,3-dihydropyridinium bromide Pyridinium, 2,3-dihydro-1,3,3-trimethyl-4-phenyl-