C=C1C(=O)[C@@]23[C@@H](C[C@H](O)[C@@H]1[C@H]2O)[C@@]1(C)[C@@H](O)CCC(C)(C)[C@H]1C[C@H]3O
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?