2,5-Dihydro-2-methylthiophene 1,1-dioxide 2-Methylsulfol-3-ene 2-Methylsulfolene 4-17-00-00153 (Beilstein Handbook Reference) 6007-71-2 BRN 0110050 THIOPHENE, 2,5-DIHYDRO-2-METHYL-, 1,1-DIOXIDE