CC1CC/C(=C\c2ccc(F)cc2)C2=C1C(c1ccc(F)cc1)n1c(s/c(=C/c3cccc(Br)c3)c1=O)=N2
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?