Cc1cccc(C)c1NC(=O)COC(=O)c1c2c(nc3ccccc13)/C(=C\c1ccc3c(c1)OCO3)CCC2
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?