CCCN1C(=O)C2(C(C(=O)c3ccc(C)o3)=C(O)C(=O)N2CCCN2CCOCC2)c2ccccc21
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?