CC(C)[C@]1(O)[C@@H](OC(=O)c2ccc[nH]2)[C@]2(O)[C@@]3(C)C[C@@]4(O)O[C@@]5([C@H](O)[C@@H](C)CC[C@]35O)[C@]2(O)[C@]41C
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?