C[C@@H](CO)N1C[C@@H](C)[C@@H](CN(C)Cc2ccc(Cl)c(Cl)c2)OCCCC[C@@H](C)Oc2ccc(NC(=O)Nc3ccc(F)cc3)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?