O=C(NNC(=O)c1ccc2c(c1)C(=O)N(CC1CCCO1)C2=O)c1cccnc1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?