Cc1ccc(-n2ncc(C(=O)NCCCN3CCCCC3)c2C2CCN(C(=O)OC(C)(C)C)CC2)c(C)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?