Cc1cccc(C)c1NC(=O)Cn1c(=O)n(CCCC(=O)NC2CCN(Cc3ccccc3)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?