Trazodone hydrochloride impurity B [BP];Dechloro Trazodone;Deschloro trazodone;1,2,4-Triazolo(4,3-a)pyridin-3(2H)-one,2-(3-(4-phenyl-1-piperazinyl)propyl);2-(3-(4-Phenylpiperazin-1-yl)propyl)-1,2,4-triazolo(4,3-a)pyridin-3(2H)-one;2-[3-(4-phenyl-piperazin-1-yl)-propyl]-2H-[1,2,4]triazolo[4,3-a]pyridin-3-one;2-[3-(morpholin-4-yl)-propoxy]-benzoic acid;2-[3-(4-Phenyl-1-piperazinyl)propyl]-1,2,4-triazolo[4,3-a]pyridin-3(2H)-one