CC(C)NC(=O)Nc1ccc2c(c1)C(=O)N([C@H](C)CO)C[C@H](C)[C@@H](CN(C)C(=O)Nc1ccc(C(F)(F)F)cc1)O2
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?