CCc1cc(=O)oc2c3c(cc(OCC(=O)NCc4cccnc4)c12)OC(C)(C)CC3
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?