diethyl (E)-2-((3-((tert-butyldimethylsilyl)oxy)-4-oxo-4H-pyran-2-yl)methyl)-2-(3-(4-methyl-N-((trifluoromethyl)sulfonyl)phenylsulfonimidoyl)allyl)malonate

diethyl (E)-2-((3-((tert-butyldimethylsilyl)oxy)-4-oxo-4H-pyran-2-yl)methyl)-2-(3-(4-methyl-N-tosylphenylsulfonimidoyl)allyl)malonate

diethyl (E)-2-((3-((tert-butyldimethylsilyl)oxy)-4-oxo-4H-pyran-2-yl)methyl)-2-(3-(4-methyl-N-(4-nitrobenzoyl)phenylsulfonimidoyl)allyl)malonate

diethyl (3aS,7S,8S,8aR)-5-((tert-butyldimethylsilyl)oxy)-8-(4-methyl-N-(4-nitrobenzoyl)phenylsulfonimidoyl)-4-oxo-4,7,8,8a-tetrahydro-1H-3a,7-epoxyazulene-2,2(3H)-dicarboxylate