CCOc1ccc(/N=N/c2ccc3cc(/C(C)=N/NC(=O)/C(C#N)=C\c4ccc(N(CCC#N)CCC#N)cc4)c(=O)oc3c2)cc1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?