CC(C)(C)OC(=O)NC(Cc1ccc(OCc2ccccc2)cc1)C(=O)NC(COCc1ccccc1)C(=O)Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl
A lower number of pka indicates that the acid dissociates more entirely in water. What is pka of the molecule?