CO[C@](C(=O)OC[C@H]1[C@@H](COC(C)=O)[C@@H]2O[C@H]1c1cc3c(cc12)OCO3)(c1ccccc1)C(F)(F)F
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?