CC1O[C@@H](OC2CC(O)[C@@]3(CO)C4C(O)C[C@@]5(C)C(C6=CC(=O)OC6)CC[C@]5(O)C4CC[C@]3(O)C2)C(O)C(O)C1O
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?