COc1ccc(NC(=O)/C(CC2=Nc3ccc([N+](=O)[O-])cc3NC2O)=N\NC(=O)C[N+](C)(C)C)c(OC)c1.[Cl-]
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?