SEARCH Articles Figures Tables Benzo thiophenes, hydroxy Benzo thiophenes, hydroxy tautomerism Thiophene 2-hydroxy-, tautomerism Thiophene 5- methyl-2-hydroxy-, tautomerism Thiophenes 2,3-dihydro-3-hydroxy- from Thiophenes 3-hydroxy- from Thiophenes 5-aryl-3-hydroxy Thiophenes hydroxy-, alkylation Thiophenes hydroxy-, tautomerism Thiophenes, hydroxy-, chlorination