2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol-d4 (2E)-2-Butenedioate,2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol-d4 (2E)-2-Butenedioate,"Labeled Quetiapine, intended for use as an internal standard for the quantification of Quetiapine by GC- or LC-mass spectrometry.",Quetiapine Stable Isotopes