The molecule is the 2'-deoxyribonucleoside triphosphate oxoanion that is 5-methyl-dCTP protonated to pH 7.3. It is a conjugate base of a 5-methyl-dCTP.
[[[(2R,3S,5R)-5-(4-amino-5-methyl-2-oxopyrimidin-1-yl)-3-hydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-oxidophosphoryl] phosphate