methyl trans-1,1-dioxo-3-nitromethyl-2,3-dihydrothieno<2.3-b>thiophene-2-carboxylate

C-(2,3-Dihydro-thieno[2,3-b]thiophen-3-yl)-methylamine

3-acetamidomethyl-2,3-dihydrothieno<2.3-b>thiophene

1H-3,4,4-trioxo-2,3,3a,7b-tetrahydrothieno<2',3':5,4>thieno<2.3-c>pyrrole

3-aminomethyl-1,1-dioxo-2,3-dihydrothieno<2.3-b>thiophene-2-carboxylic acid