NC(=O)c1nsc(C(=O)N(c2ccccc2)C(C(=O)NCC2CCCO2)c2ccc3ncccc3c2)c1N
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?