CC(C)C(c1nnnn1Cc1ccccc1)N(CCCO)Cc1cc2cc3c(cc2nc1O)OCO3
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?