COC(=O)c1cccc(C23CC4(C2)[C@@H](c2ccccc2)N(Cc2cccnc2)C[C@@H]4C3c2ccc(C(F)(F)F)cc2)c1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?