O=C1C[C@H]2[C@H](c3ccc(Br)cc3)[C@H]3C(=O)c4ccccc4NC(=O)[C@@H]3[C@@]2(O)c2ccccc2N1
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?