COC(=O)c1ccc(C(NC(=O)OCc2ccccc2)/C(=C/[C@@H](C)C(=O)NCc2ccc(S(C)(=O)=O)cc2)c2cccnc2)cc1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?