O=C(NCCc1c[nH]c2ccccc12)C(=O)NCC(c1ccco1)N1CCN(c2ccc(F)cc2)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?