CC1CCN(C(C(=O)Nc2ccc(C(C)C)cc2)c2ccc3c(c2)OCO3)CC1
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?