| http://www.w3.org/ns/prov#value | - can be prepared in a two-step procedure from a compound of Formula XL in which R1 is ???X??????O???NH2, using the methods described in step 5a of Reaction Scheme I. Alternatively, a reagent of the Formula P???O???R7C(O)Cl, wherein P is a protecting group, may react with a compound of Formula XL in which R1 is ???X??????O???NH2 to generate an isolable intermediate that can then be deprotected to yi
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