C[C@H](C1CC2(C)OC2(C)C(=O)O1)[C@H]1CC[C@H]2[C@@H]3[C@@H]4O[C@@H]4[C@@]4(O)CC=CC(=O)[C@]4(C)[C@H]3CC[C@@]21C
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?