CC(C)CO/N=C1/C[C@@H](O)[C@@H](O)[C@@H]2[C@@H]3C(=O)N(C4CCCCC4)C(=O)[C@H]3CC[C@@H]12
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?