O=C1[C@H]2CC[C@H]3/C(=N\OCc4ccccc4)C[C@@H](O)[C@@H](O)[C@@H]3[C@@H]2C(=O)N1C[C@@H]1CCCO1
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?