Cc1c(C2Cc3ccccc3N2C(=O)/C=C\C(=O)O)c2ccccc2n1C
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?