Cc1ccc(CNC(=O)[C@@H]2C[C@H]2[C@@H](NP(=O)(c2ccccc2)c2ccccc2)c2ccccc2)o1
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?