Cc1ccc(CNC(=O)c2ccc(N3CCC4(CC3)CC(c3cccc(Br)c3)=NO4)c([N+](=O)[O-])c2)cc1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?