CC(=O)c1c(C)[nH]c(C(=O)CN2C(=O)NC(C)(c3ccc4c(c3)OCO4)C2=O)c1C
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?