Cc1cccc(N2CCN(C(=O)CS(=O)(=O)Cc3nc(-c4ccccc4C)oc3C)CC2C)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?