C[C@H]1CC[C@@H]2N(C1)C[C@H]1[C@@H]3C[C@H]4[C@@H](C/C(=N\O)[C@H]5C[C@@H](O)CC[C@@]54C)[C@@H]3CC[C@H]1[C@]2(C)O
A higher negative pKa value denotes a less powerful acid. What is this molecule's negative pKa value?