CC[C@]1(Cc2ccc(OC)c(OC)c2)C2CC(C(=O)OC)ON2O[C@H](OCc2ccccc2)[C@@H]1OC(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?