Aryl and heteroaryl may also be substituted by alkyl, alkenyl or alkynyl, or by additional aryl or heteroaryl moieties. [0045] ???A derivatized oxime??? is of the formula ???N???O???R, wherein R is other than H and is otherwise defined as above. [0046] A ???protecting group??? for a hydroxy includes acyl groups, silyl groups, and the like.