CCOP(=O)(OCC)c1ccc(OP(=O)(c2cccc([N+](=O)[O-])c2)c2cccc([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?