CCOC(=O)[C@@]1(C)C=C2O[C@@H]3OC4(CCCCC4)O[C@@H]3C2=C2C(O)=CC=C(O)[C@]21C(=O)OC
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?