CC[C@]12c3[nH]c4cc(CCC(=O)N(C)C)ccc4c3CCN1C(=O)[C@@H](CC(=O)NCc1cccc(C(F)(F)F)c1)C[C@@H]2C(=O)N1CCN(C(=O)C2CC2)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?