CC1(C)Oc2ccc3c(=O)c(-c4ccccc4)c(-c4ccccc4)oc3c2C1C(=O)O
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?