Cc1nc2nc(SCC(=O)NC(C)c3ccccc3)nn2c(C)c1Cc1c(F)cccc1Cl
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?