CCOCCCNC(=O)C(c1ccc(OC)cc1)N(Cc1ccc2c(c1)OCO2)C(=O)c1ccc(NC(C)=O)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?