Cc1ccccc1Cn1nc(C)c(NC(=O)/C=C/c2cnn(C)c2C)c1C
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?