COc1ccc2c(c1)O[C@@H](c1cccc(C(F)(F)F)c1)[C@H](OC(=O)NCCc1ccc(OC)c(OC)c1)C2=O
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?