ethyl (2R)-4-[4-(cyclohex-1-en-1-yl)-1H-pyrazol-1-yl]-2-methyl-2-(methylsulfonyl)butanoate
ethyl (2R)-4-(4-iodo-1H-pyrazol-1-yl)-2-methyl-2-(methylsulfonyl)butanoate
(2R)-ethyl 4-bromo-2-methyl-2-(methylsulfonyl)butanoate
ethyl (±)-4-bromo-2-methyl-2-(methylsulfonyl)butanoate
cyclohex-1-enylboronic acid