COC(=O)C1=C(O)C(C(=O)OC)[C@]2(O)[C@H](C(=O)OC)[C@H]1C[C@@H](c1ccc(Cl)cc1Cl)[C@H]2C(=O)OC
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?