CC(C)(C)C(=O)O[C@H]1CC[C@@]2(C)C(=CC(=O)C3C4C[C@@H](O)C(=O)[C@@]4(C)CCC32)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?