CCOc1ccc(CCn2c3c(c(=O)[nH]c2=O)C(NC(=O)c2cccc(F)c2)(C(F)(F)F)C(=O)N3)cc1OCC
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?