COc1ccc(C(c2ccccc2)(c2ccc(OC)cc2)N2C(=O)NC3C(CCCCC(=O)NCCCCCCOP(OCCC#N)N(C(C)C)C(C)C)SCC32)cc1
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?