CCOC(=O)c1cc(C2CCN(CC(C)CC)C2=S)c(-c2cc(C)no2)[nH]1
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?