C=C1C(=O)C2=C[C@H]1C[C@H](O)C(=O)[C@]1(C)CCCC(C)(C)[C@H]1C[C@H]2O
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?