| http://www.w3.org/ns/prov#value | - Representative of the groups R and R1 are phenyl, benzyl, thienyl, pyridyl, pyrimidyl, thiazyl, furyl, cyclohexyl, cyclohexenyl, propyl, isopropyl, butyl and others of these general types as well as their chlorine, bromine, dialkylamino, lower alkoxy and lower alkyl substitution products.
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