O=C(OCc1nnc(-c2ccc([N+](=O)[O-])cc2)o1)c1ccc(F)c(S(=O)(=O)N2CCOCC2)c1
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?