CCc1ccc(OCC(O)Cn2c(N3CCCCC3)nc3c2c(=O)[nH]c(=O)n3C)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?