north-methanocarbathymidine north-methanocarbathymidine north-methanocarbathymidine (n-mct) is an antiviral drug which is an analogue of thymidine, and shows activity against herpesviruses, orthopoxviruses and hiv, though it has not been introduced into clinical use. north-methanocarbathymidineclinical datatrade namesn-mctlegal statuslegal status us: investigational drug identifiers iupac name 1-hexanyl]-5-methylpyrimidine-2,4-dione cas number156126-12-4 ypubchem cid445212uniiltm5s02010chemical and physical dataformulac12h16n2o4molar mass252.27 g·mol−13d model (jsmol)interactive image smiles cc1=cn(c(=o)nc1=o)2c(3(2c3)co)o inchi inchi=1s/c12h16n2o4/c1-6-4-14(11(18)13-10(6)17)8-2-9(16)12(5-15)3-7(8)12/h4,7-9,15-16h,2-3,5h2,1h3,(h,13,17,18)/t7-,8+,9+,12+/m1/s1key:nowrlnpoenzfhp-arhdfhrdsa-n