CC1(C)OC2CC3C4CCC5=CC(=O)C=C[C@@]5(C)[C@]4(F)C(O)C[C@@]3(C)[C@]2(C(=O)CO)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?