Propafenone Related Compound B (50 mg) ((2E)-1-[2-[(2RS)-2-hydroxy-3-(propylamino)propoxy]phenyl]-3-phenylprop-2-en-1-one);Propafenone IMpurity B (EP/BP/USP);Propafenone Related CoMpound B;(2E)-1-{2-[(2RS)-2-Hydroxy-3-(propylamino)propoxy]phenyl}-3-phenylprop-2-en-1-one;Propafenone Didehydro Impurity;Propafenone EP Impurity B;1-[2-[2-hydroxy-3-(propylamino)propoxy]phenyl]-3-phenylprop-2-en-1-one;(E)-1-(2-(2-hydroxy-3-(propylamino)propoxy)