CC1CC[C@@]2(OC1)OC1C[C@H]3[C@@H]4C/C(=N\N(C)C)[C@@]5(O)CC(O)CC[C@]5(C)[C@H]4CC[C@]3(C)C1[C@@H]2C
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?