C[C@@H](CO)N1C[C@@H](C)[C@H](CN(C)Cc2ccc(Cl)c(Cl)c2)Oc2ccc(NC(=O)CCC(F)(F)F)cc2C1=O
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?