α-[2-[(1-Methylethyl-d7)aMino]ethyl]-α-phenyl-2-pyridineacetaMide Desisopropyl Disopyramide-D7 Oxalate (-Mono-N-desisopropyldisopyramide-d 4-(Isopropyl-d7)-amino-2-phenyl-2-(2-pyridyl)butyramide a-[2-[(1-Methylethyl-d7)amino]ethyl]-a-phenyl-2-pyridineacetamide Mono-N-dealkyldisopyramide-d7 (a-[2-[(1-Methylethyl-d7)amino]ethyl]-a-phenyl) (±)-Mono-N-desisopropyldisopyramide-d7