C=CC1=C(C)c2cc3[nH]c(c4c5nc(cc6[nH]c(cc1n2)c(C=O)c6CC)C(C)=C5C(=O)[C@@H]4C(=O)OC)[C@@H](CCC(=O)O)[C@@H]3C
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?