CCOC(=O)NC(=O)c1cn(-c2ccc(CCOC(=O)CCCCCCCCC(=O)OCCc3ccc(-n4cc(C(=O)NC(=O)OCC)c(=O)[nH]c4=O)cc3)cc2)c(=O)[nH]c1=O
A higher negative pKa value denotes a less powerful acid. What is this molecule's negative pKa value?