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(2007/10/02)2-oxo-3-phenyl-3,5,6,7,8,8a-hexahydro-2H-2λ4-benzo[1,2,3,6]thiatriazine-1-carboxylic acid ethyl ester
1-oxo-4,5-diphenyl-3,6-dihydro-1H-1λ4-[1,2]thiazine-2-carboxylic acid ethyl ester
4-(3-nitro-phenyl)-2-oxo-2λ4-[1,2,3,5]oxathiadiazole-3-carboxylic acid ethyl ester
4-ethyl-1,3,5-trioxo-6,6-diphenyl-1λ4,5λ4-[1,5,2,4]dithiadiazinane-2-carboxylic acid ethyl ester