CC1(C)C(=O)CCC(=O)C(C)(C)c2ccc(o2)C(C)(C)C(=O)CCC(=O)C(C)(C)c2ccc1o2
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?