3311-54-4 5-METHYL-11-(3-METHYLAMINOPROPYL)-5,6-DIHYDROMORPHATHRIDINE MALEATE 5-Methyl-11-(3-methylaminopropyl)-5,6-dihydromorphananthridine maleate EX 10-189 maleate Morphananthridine, 5,6-dihydro-5-methyl-11-(3-methylaminopropyl)-, maleate