CCCCn1c(N)c(N(CCC(C)C)C(=O)c2ccccc2-n2cnnn2)c(=O)[nH]c1=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?