CCOC(=O)c1c(C)[nH]c(C)c1S(=O)(=O)N1CCC(C(=O)N2CCN(c3cc(C)ccc3C)CC2)CC1
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?