C=C1C(=O)O[C@@H]2C[C@@H](C)[C@@H]3C=CC(=O)[C@@]3(C)[C@@H](OC(=O)CC(=O)O[C@H]3[C@@H]4C(=C)C(=O)O[C@@H]4C[C@@H](C)[C@@H]4C=CC(=O)[C@@]34C)[C@H]12
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?