C=C1C2CC[C@@]3(C)C(c4ccoc4)OC(=O)C[C@@]13OC1CC(=O)C(C)(C)C(C(OC(C)=O)C(=O)OC)[C@@]12C
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?