Cc1ccc(NC(=O)Cn2c(O)c(N=NC(=O)c3ccncc3)c3ccccc32)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?