COc1cc2[nH]c(=O)n(Cc3ccc(C(=O)N4CCN(c5cccc(C)c5C)CC4)cc3)c(=O)c2cc1OC
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?