80427-78-7
methyl 4,7-dihydroxy-1-benzothiophene-2-carboxylate
80427-80-1
methyl 4,5,7-tris(acetyloxy)benzothiophene-2-carboxylate

80427-79-8
4,7-Dioxo-2-methoxycarbonylbenzo[b]thiophene

80427-81-2
methyl 4,7-dihydro-4,7-dioxo-5-hydroxybenzothiophene-2-carboxylate

80427-85-6