In some embodiments of the above compounds, compounds are excluded where N (except where N is a heteroaryl ring atom), O, or S is bound to a carbon that is also bound to N (except where N is a heteroaryl ring atom), O, or S except where the carbon forms a double bond with one of the heteroatoms, such as in an amide, carboxylic acid, and the like; or where N (except where N is a heteroaryl ring ato