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