O=C(NC1(C(F)(F)F)C(=O)Nc2c1c(=O)[nH]c(=O)n2CCc1ccccc1)c1ccc(Cl)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?