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2-((1-(Thiophen-2-yl)ethylidene)amino)ethanesulfonic acid: BD717351141096-82-497%; ￥

Thiophene-2-sulfonic acid: BD21332679-84-595%; ￥3877.01g

5-Bromothiophene-2-sulfonic acid: BD62720473348-44-497%; ￥

5-(3-Ethoxyphenyl)thiophene-2-sulfonic acid: BD4383681416438-59-997%; ￥4914.01g

3-Methylthiophene-2-sulfonic acid: BD2146001159877-58-395+%; ￥

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