Experimental A JEOL AccuTOF™-DART® mass spectrometer was used to acquire positive-ion mass spectra at a resolving power of >10,000 (FWHM). The DART was operated in positive-ion mode with helium gas and a gas heater temperature of 350°C. Chlorpromazine was analyzed by dipping a melting point tube into a dilute solution of chlorpromazine in dichloromethane and dangling the tip of the tube in the DART gas stream. Jeffamine® M-600 (Huntsman) copolymer was measured in the same data file as an external calibrant for exact mass measurements. Mass Mountaineer™ software was used for elemental composition determinations from accurate mass measurements and isotope matching.