C[C@@H]1O[C@H](O[C@H]2[C@@H](O)[C@H](O)[C@H](O)[C@H](O)[C@H]2O)[C@@H](N)C[C@@H]1/N=C(\N)C(=O)O
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?