20627-70-7 3-Hydroxy-4-methoxysulfolane 4-Hydroxy-3-methoxysulfolane 4-Methoxytetrahydrothiophene-3-ol 1,1-dioxide Thiophene-3-ol, 4-methoxytetrahydro-, 1,1-dioxide (8CI) Thiophene-3-ol, tetrahydro-4-methoxy-, 1,1-dioxide