Cc1ccc(C)c(Cn2nnc3c(O)nc(C4CCCN(C(=O)C5CCC5)C4)nc32)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?