CCOC(=O)[C@]1(OC(C)=O)C[C@H](OC(C)=O)[C@@H](C(F)COP(=O)(OCc2ccccc2)OCc2ccccc2)O1
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?