Cc1cccc(N2CCN(C(=O)c3cc4c(=O)[nH]c5ccc(C)cc5c4s3)CC2C)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?