Cc1c(CCC(=O)N2CCC(C(=O)NCCCCCC(=O)O)CC2)c(=O)oc2cc3oc4c(c3cc12)CCCC4
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?