Cc1ccc2nc3nc(NCC4CCCO4)c(C(=O)NCC4CCCO4)cc3c(=O)n2c1
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?