CC(C)c1ccccc1OCC(O)CN1CCN(S(=O)(=O)c2ccc([N+](=O)[O-])cc2)CC1.O=C(O)C(=O)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?