CCOC(=O)c1[nH]ncc1CN1CCCC(C(=O)c2ccc(OC)c(OC)c2)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?