| http://www.w3.org/ns/prov#value | - wherein Z is ???CO??? or ???SO2??? and R1 and R2 are each independently hydrogen or lower alkyl, Y is lower alkylene, ???CH2CH2OCH2CH2???, or ???CH2CH2CH2OCH2CH2CH2???, X is a direct bond, ???O???, ???S???, ???NH???, ???COHN???, or ???SO2NH???, R??? is lower alkyl, cyclohexyl, phenyl, or phenyl substituted by chlorine, lower alkyl, or lower alkoxy, or bromine, the nucleus B is either unsubstituted
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