CC(C)CC1NC(=O)C(Cc2ccccc2)NC(=O)C(Cc2ccccc2)NC(=O)C(NC(=O)C(Cc2ccc(OCc3ccccc3)cc2)NC(=O)OCc2ccccc2)CCNC1=O
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?