CCC(C)n1c(=N)c(C(=O)NCc2ccco2)cc2c(=O)n3cc(C)ccc3nc21
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?