CCOC(=O)c1c(NC(=O)COC(=O)c2nccnc2N)sc2c1CCC2
The negative base-10 logarithmic of acid dissociation constant (pKa) is a measure of the extent to which an acid dissociates in solution and therefore its strength. The less an acid dissociates, the higher the value of negative pKa. Please predict the negative pKa value of this molecule.