| http://www.w3.org/ns/prov#value | - Specifically, R2 can be a group of the formula: A specific group of compounds are compounds of formula (I) wherein X is a direct bond and R3 is 3,5-dimethylpyrazol-1-yl, 2-phenylimidazol-1-yl, 2-ethylimidazol-1-yl, 1-benzimidazolyl, 4-(methoxycarbonyl)imidazol-1-yl, 4-methyl-2-ethylimidazol-1-yl, or 4-phenyl-1-imidazol-1-yl.
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