prazitone prazitone prazitone (agn-511) is a barbiturate derivative developed in the 1970s. unlike most barbiturates, it has little or no sedative effects, instead acting as a non-sedating anxiolytic and antidepressant. the dosage range in humans is around 200–600 mg, although higher doses have been used in trials for the treatment of depression associated with parkinson's disease. prazitoneclinical dataother names5-phenyl-5-(2-piperidylmethyl)barbituric acidatc codenoneidentifiers iupac name 5-phenyl-5-(piperidin-2-ylmethyl)pyrimidine-2,4,6(1h,3h,5h)-trione cas number2409-26-9 ypubchem cid3050417chemspider2312482 nunii6dzb018428chemical and physical dataformulac16h19n3o3molar mass301.346 g·mol−13d model (jsmol)interactive image smiles c1ccnc(c1)cc2(c(=o)nc(=o)nc2=o)c3=cc=cc=c3 inchi inchi=1s/c16h19n3o3/c20-13-16(11-6-2-1-3-7-11,14(21)19-15(22)18-13)10-12-8-4-5-9-17-12/h1-3,6-7,12,17h,4-5,8-10h2,(h2,18,19,20,21,22) nkey:ugzakkmlmjitll-uhfffaoysa-n n ny (what is this?) (verify)