CC(C)C[C@@H](CN1CCC[C@@H]1CN1C(=O)C(=O)NC[C@@H]1Cc1ccccc1)N1C[C@H](Cc2ccc(O)cc2)N(CCc2ccccc2)C(=O)C1=O
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?