Cc1ccc(CNC(=O)C(=O)NCC2OCCN2C(=O)c2ccc3c(c2)OCO3)cc1
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?