CCOC(=O)c1c(C)oc2c1c(/C=N/c1ccccn1)c(O)c1ccccc12
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?