2,3-Dihydrothiophene-3-ol 1,1-dioxide 3-Hydroxy-2,3-dihydrothiophene 1,1-dioxide 3-Hydroxysulfolene-2 4-17-00-01180 (Beilstein Handbook Reference) 4-Hydroxysulfol-2-ene 6211-59-2 BRN 0002823 Thiophene-3-ol, 2,3-dihydro-, 1,1-dioxide