COc1ccc(-c2ccc(OC)c([C@H]3[C@H]4C=CC[C@@H](C)[C@@H]4C(=O)N3Cc3ccccc3)c2)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?