CCn1c(O)c(/C=N/N=C2CCCCC2)c2cc(C3=NNC(=O)CC3)ccc21
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?