CCCCN(C)C(=O)CCCCn1c(=O)[nH]c2cc(OCC)c(OCC)cc2c1=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?