O=C(C1=NN[C@@H]2C(=O)N(c3ccccc3C(F)(F)F)C(=O)[C@H]12)C(c1ccccc1)c1ccccc1
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?