CSCCC(c1nnnn1-c1ccc2c(c1)OCCO2)N1CCC2(CC1)C(=O)NCN2c1ccccc1
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?