CCOC(=O)c1cnc(-n2[nH]c3c(c2=O)CCCC3)[nH]c1=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?