C/C=C/[C@H]1O[C@@](OC)([C@@H](C)[C@H](O)[C@H](C)[C@H]2OC(=O)/C(OC)=C/C(C)=C/[C@@H](C)[C@@H](O)[C@@H](C)[C@@H](O)[C@H](C)C/C(C)=C/C=C/[C@@H]2OC)CC(OC2CC(O)C(OC(N)=O)C(C)O2)[C@@H]1C
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?