3,4-Diiodo-2-nitro-5-(trifluoromethoxy)pyridine
2,3-Dimethoxy-4-(difluoromethyl)-6-(trifluoromethoxy)pyridine
3,5-Dimethoxy-2-(fluoromethyl)-6-(trifluoromethoxy)pyridine
3,4-Dimethoxy-6-(fluoromethyl)-2-(trifluoromethoxy)pyridine
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