| http://www.w3.org/ns/prov#value | - wherein R1 is a group represented by the formula: ???Y1???Y2???Y3???Ra wherein Y1 is single bond or the like; Y2 is ???C(???O)???NH??? or the like; Y3 is optionally substituted aryl or the like; R2 is hydrogen or the like; R3 is alkyl or the like; R4 is alkyl or the like; R5 is optionally substituted alkyl or the like; or R3 and R4 taken together with the adjacent atom form cyclic group or the lik
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