Cc1ccc(-c2nc3c(c(=O)[nH]c(=O)n3Cc3ccccc3)n2Cc2ccccc2)o1
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?