CCOC(=O)c1cccc(C2=C(CNC(=O)c3cccnc3)[C@H]3CC[C@@H](C2)N3Cc2ccccc2)c1
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?