C=C1C(=O)O[C@@H]2C[C@@H](C)[C@@H]3[C@@H](OC4OC(COC(C)=O)C(O)C(O)C4O)CC(=O)[C@@]3(C)C[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?