COc1ccc(CN2CC(=O)N3[C@H]4c5cc(C)ccc5OC[C@@H]4[C@H](c4ccccc4)[C@]3(C)C2=O)cc1
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?