1,1-dimethoxy-2-methyl-2,5-dihydrosilole

6-methylcyclohepta-1,4-diene

5-methyl-7-oxabicyclo[4.1.0]hepta-2,4-diene

2-methoxy-8-methylnaphthalene-1,4-dione

1,2,3,4-tetrabromo-pentane