| http://www.w3.org/ns/prov#value | - with the proviso that when R1 is ???CH2CH3 and R7 is a radical of the formula wherein R13 is hydrogen, C(O)R4, ???Si(R10)3, C1-C10 alkyl, or C1-C18 alkanoyl, wherein one or two carbons in the alkyl portion of said alkyl or alkanoyl may be optionally replaced by a heteroatom selected from O, S, and NR2, than X must be other than imidazole.
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