NC(N)=NCCC[C@H](N)C(=O)NCC(=O)N[C@@H](CC(=O)O)c1ncc(NC(=O)C(F)(F)F)o1.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?