C[C@]12CC[C@@H]3[C@H](CC[C@H]4C[C@@H](O)CC[C@@]43C)[C@@H]1CC[C@H]2C(=O)CO
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?