Cc1cn(C2CC(O)C(Cn3nncc3Cn3cnc4c(N)ncnc43)O2)c(=O)[nH]c1=O
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?