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(2012/04/17)Ethyl α-(methylsulfonyl)propionate
ethyl (±)-4-bromo-2-methyl-2-(methylsulfonyl)butanoate
5-fluoro-4-iodopyridin-2(1H)-one
(2R)-ethyl 4-bromo-2-methyl-2-(methylsulfonyl)butanoate
preparation of 2,5-difluoro-4-iodopyridine