CC/C=C\[C@H](O)[C@H](O)C1=C(C)C(=O)[C@]2(O1)C(=O)N[C@@](OC)(C(=O)c1ccccc1)C2O
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?