CC(C)(C)c1ccc(Oc2cccc(C3CC(=O)C(C4NCCc5ccccc54)C(=O)C3n3cncn3)c2)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?