COC(=O)c1ccc(C23CC4(C2)[C@@H](c2ccccc2)N(CC2CCCCC2)C[C@@H]4C3c2ccc(C(F)(F)F)cc2)cc1
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?