COc1ccc(-c2c([C@H]3[C@@H]4C=CCC[C@@]4(C)C(=O)N3Cc3ccccc3)ccc3ccccc23)cc1OC
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?