CC(=O)O/C=C1/C[C@H]2[C@@H]3CCC4CC(C(C)=O)CC[C@]4(C)[C@H]3CC[C@]2(C)C1=O
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?