CCCC(C)c1nc(C(N)=O)c2nc(O)n(-c3ccc(OC)c(OC)c3)c2n1
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?