Cc1cccc(-c2ccc3[nH]c4c(c3c2)CCN2C[C@@H]([C@H](C)O)[C@@H](N(C)C(=O)Nc3ccc(F)cc3)C[C@@H]42)c1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?