(1,1-Dioxotetrahydro-1-lambda*6*-thiophen-3-yl-amino)acetic acidN-(1,1-Dioxidotetrahydro-3-thienyl)glycineN-(1,1-Dioxidotetrahydro-3-thienyl)glycine hydrochloride3-[(Carboxymethy)lamino]thiolane 1,1-dioxideN-(1,1-Dioxidotetrahydrothien-3-yl)glycine[(1,1-Dioxidotetrahydrothien-3-yl)amino]acetic acid2-((1,1-dioxidotetrahydrothiophen-3-yl)amino)acetic acid