O=C(Cc1ccc(-n2c(=O)c3ccccc3n(CC(=O)Nc3ccc(F)cc3F)c2=O)cc1)NCc1ccco1
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?