CCCCCCCCCCCCCCCCOCC(Cl)COP(=O)([O-])OP(=O)(O)OCC1OC(n2cnc3c(N)ncnc32)C(O)C1O.[Na+]
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?