Cc1cccc(C2c3[nH]c4ccccc4c3CCN2C(=O)Cc2n[nH]c(C)n2)n1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?