CC(=O)OC1CC[C@@]2(C)C(=CC[C@H]3[C@@H]4CC[C@H](C(C)=O)[C@@]4(C)CC[C@@H]32)C1
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?