Cc1ccccc1NC(=O)Cn1c(=O)n(-c2ccc(CC(=O)NCC3CCCO3)cc2)c(=O)c2ccccc21
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?