NC(=O)CC(NC(=O)Cc1ccc(Br)cc1)c1ccc(N2CCC(Cc3ccccc3)CC2)c([N+](=O)[O-])c1
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?