CNC(=O)N1CN(c2ccccc2)C2(CCN(CCCC3(c4ccc(F)cc4)OCCO3)CC2)C1=O.O=C(O)/C=C/C(=O)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?