CCCCCCCCCC[C@H](O)[C@H]1CC[C@H]([C@H]2CC[C@H]([C@H](O)CC[C@H](O)CCCCCCC[C@@H](O)CC3=C[C@H](C)OC3=O)O2)O1
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?