CCC(Sc1nc2cc3c(cc2c(=O)n1Cc1ccco1)OCO3)C(=O)Nc1cccc(OC)c1
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?