C=CCC[C@H](Cc1ccc(F)cc1)C(=O)OC[C@@H](Cc1c[nH]c2ccccc12)NC(=O)[C@H](CC=C)CC(=O)NCCO
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?