CC(=O)N/C(=C\c1cccc([N+](=O)[O-])c1)c1nc2ccc3c(c2[nH]1)C(=O)c1ccccc1C3=O
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?