Cc1ccc(CNC(=O)c2ccc(N3CCC4(CC3)CC(c3ccccc3)=NO4)c(NC(=O)c3ccc(Cl)c([N+](=O)[O-])c3)c2)cc1
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?