COc1ccc(C(=O)N[C@H]2CCCCNC2=O)cc1OC1CCN(C(C)C)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?