Flupentixol Dihydrochloride Imp. H (EP): 2-[4-[(E)-3-[(9RS)-2-(trifluoromethyl)-9H-thioxanthen-9-yl]prop-2-en-1-yl]piperazin-1-yl]ethan-1-ol or 2-[4-[(Z)-3-[(9RS)-2-(trifluoromethyl)-9H-thioxanthen-9-yl]prop-2-en-1-yl]piperazin-1-yl]ethan-1-ol.