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(2007/10/02)methyl 3-<<<(methoxcarbonyl)methyl>amino>sulfonyl>-2-thiophenecarboxylate
methyl 4-hydroxy-2H-thieno<2,3-e>-1,2-thiazine-3-carboxylate 1,1-dioxide
3-chlorosulfonyl-thiophene-2-carboxylic acid chloride
2-(carbomethoxy)thiophene-3-sulfonyl chloride
p-Methoxybenzyl bromide