thiophene 1,1-dioxide

4-methylazulene

1,3,3a,4,9,9a-hexahydrothieno[3,4-b]quinoxaline 2,2-dioxide

1,3-bis(2,4,6-trimethylphenyl)urea

3-mesityl-3a,6a-dihydrothieno[2,3-d]isoxazole 4,4-dioxide