CC(=O)O.CCOc1ccc(NC(=O)CN2C(=O)/C(=C3\SC(=S)N(C4CCS(=O)(=O)C4)C3=O)c3ccccc32)cc1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?