Cc1cccc(N(C(=O)CNC(=O)c2ccco2)C(C(=O)NC2CCCC2)c2ccncc2)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?