CC(C)Oc1cc(C(=O)N2CCC(N3CCCCC3)CC2)ccc1Nc1nnc(Cl)c(Nc2ccccc2S(C)(=O)=O)n1
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?