CN(C)CCNC(=O)c1onc(CSc2nc3ccccc3[nH]2)c1C(=O)NCCN(C)C
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?