CC(=O)OCC(=O)[C@@]1(O)[C@H](C)C[C@@H]2[C@H]3CCC4=CC(=O)C=C[C@]4(C)[C@]3(F)[C@@H](O)C[C@@]21C
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?