COc1ccc(C2CC(=O)c3cc(-c4nc(-c5cccc([N+](=O)[O-])c5)cs4)c(=O)n(-c4ccccc4)c3C2)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?