CC(C)=CCC/C(C)=C/C=C/C(C)=C/C1C[C@@]2(C(O)O1)[C@H](CCCO)/C(=C(/C)C=O)CC[C@]2(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?