CCCCCn1c(=O)[nH]c2cc(C(=O)NCCCN3CCCCC3)ccc2c1=O
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?