CC1C(=O)OC2C(O)C34C5OC(=O)[C@@]3(OC3OC(=O)[C@H](O)[C@]34C(C(C)(C)C)C5O)[C@]12O
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?