CC(=O)OC[C@@H]1O[C@@H](O/N=C2/C[C@@H](O)[C@@H](O)[C@H]3[C@@H]2CC[C@@H]2C(=O)N(C(C)(C)C)C(=O)[C@H]23)[C@H](OC(C)=O)[C@H](OC(C)=O)[C@@H]1OC(C)=O
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. This compound should contain a more electronegative atom (more electronegative than hydrogen) with lone electron pairs. Then it can attract protons from a donor. Moreover, the electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?