CC[C@@]1(C(=O)OC)N[C@H](CN(C)C(=O)C2CCCCC2)[C@@H]2C(=O)N(Cc3ccccc3)C(=O)[C@@H]21.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?