| http://www.w3.org/ns/prov#value | - The term R.sup.1 is as defined above, and X is a leaving group (such as halogen (chlorine, bromine or iodine) or OSO.sub.2 CF.sub.3).The compounds of formula (I) may be prepared by reacting a compound of formula (II) with the salt of an oxime of formula (III) under basic conditions.
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