COC(=O)CCCC/C(=N\Nc1nc2ccccc2c2ccccc12)C1=C(O)CC(C)(C)CC1=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?