C=CCn1c(O)c(N=NC(=O)CNC(=O)/C=C/c2ccc(OC)cc2)c2ccccc21
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?