CCN(CC)CCN1C(=O)C(O)=C(C(=O)c2c(C)[nH]c(C(=O)OC)c2C)C1c1ccco1
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?