COC(=O)[C@@H]1C[C@@]23CCCN4CC[C@@]5(c6cccc(OC)c6N(C=O)[C@]15CC2)[C@@H]43
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?