C=C(C)[C@@H]1CC[C@@H](C)[C@](O)([C@@H]2C[C@@H]([C@H](COC(=O)c3ccccc3)OC(=O)c3ccccc3)OC2=O)C1
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?