NC(=O)CC[C@@H]1NC(=O)[C@@H]2CCCN2C(=O)c2cc([N+](=O)[O-])cc(F)c2NCCC[C@@H](C(N)=O)NC1=O
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?