CCCCc1c(O)n(-c2ccc(OC)cc2)c(SCC(=O)Nc2ccc(C)cc2)nc1=O
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?