CC1=C(CC[C@H](C)CO)O[C@@H]2C[C@@H]3[C@H]4CC[C@H]5C[C@@H](O)CC[C@]5(C)[C@@H]4CC(=O)[C@@]3(C)[C@@H]12
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?