O=C(CN(CC1CCCO1)C(=O)CCC(=O)Nc1nccs1)NCC1CCCO1
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?