Cc1ccc2c(c1C)NC(=O)C21N2CCCC2C(C(=O)c2ccc3ccccc3c2)C12C(=O)Nc1ccccc12
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?