COc1ccc(C2C(C#N)=C(S)N(C3OC(COC(C)=O)C(OC(C)=O)C(OC(C)=O)C3OC(C)=O)C(c3ccccc3)=C2C(C)=O)cc1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?