COc1ccc(CNC(=O)O[C@@H]2C[C@H]3C(=O)N(c4ccccc4)C(=O)[C@H]3[C@@]3(CN(S(=O)(=O)c4ccc(C)cc4)C[C@H]3C)[C@@H]2O)cc1OC
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?