CCOC(=O)N1CCN([N+]([O-])=NOc2cc(O/N=[N+](\[O-])N(CC)CC)c([N+](=O)[O-])cc2[N+](=O)[O-])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?