CN1C(=O)[C@H]2[C@@H](C1=O)[C@@H](/C=C/c1ccccc1)N1C(=O)CN(Cc3ccc(-c4ccccc4)cc3)C(=O)[C@@]21C
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?