CCc1ccc(N(C(=O)c2snc(C(N)=O)c2N)C(C(=O)NC2CCCC2)c2ccncc2)cc1
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?