Cc1nc2c(sc3nc(N4CCOCC4)c4c(c32)CC(C)(C)OC4)c(-c2ccc(Cl)cc2)c1C(=O)O
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?