CC[C@]1(C(=O)OC)[C@H]2C(=O)N(C)C(=O)[C@H]2[C@H]2CN=C(SCc3ccc(C(=O)OC)cc3)N21.O=C(O)C(F)(F)F
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?