COCCn1c(SCC(=O)N(C)c2c(N)n(Cc3ccccc3)c(=O)[nH]c2=O)nnc1-c1cccc(C)c1
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?