C[C@@H](CO)N1C[C@@H](C)[C@@H](CN(C)C(=O)Nc2ccccc2C(F)(F)F)OCc2cnnn2CCCC1=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?