2-(2-(4-(dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy-1,1,2,2-d4)ethan-1-ol hemifumarate,2-(2-(4-(dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy-1,1,2,2-d4)ethan-1-ol hemifumarate,"Labeled Quetiapine, intended for use as an internal standard for the quantification of Quetiapine by GC- or LC-mass spectrometry.",Quetiapine Stable Isotopes