COc1ccc(NC(=O)O[C@@H](C)[C@@H]2CN3CCc4c([nH]c5ccc(-c6ccc(OC)cc6)cc45)[C@@H]3C[C@@H]2N(C)C(=O)Nc2ccc(OC)cc2)cc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?