COc1ccc(C(=O)/C=C/C(=O)N(Cc2ccc3c(c2)OCO3)C(C(=O)NC2CCCCC2)c2ccncc2)c(O)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?