CN(C)CCN1C(=O)CC[C@@]2(C)C1=CC[C@H]1[C@@H]3CC[C@](C)(O)[C@@]3(C)CC[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?