C[C@@H]1[C@H]2C=C[C@@H]1[C@@H](c1c3ccc(=O)c(O)c-3oc3c(O)c(O)ccc13)[C@@H]2C(=O)O
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?