Cc1ccc(C)c(OCCN2C(=O)NC3(CCc4ccccc4C3)C2=O)c1
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?