3,3,3',3',5,5,5',5'-octamethyl-3,3',5,5'-tetrahydro-4,4'-bi(4H-pyrazolylidene)

1-(2-hydroxy-2,4-dimethylpent-3-ylidene)-2,2,3,3-tetramethyl-cyclopropane

1,1,2,2-tetramethyl-3,4-di(propan-2-ylidene)cyclobutane

2,2,4,4-tetramethylthietan-3-one 1,1-dioxide

3-hydrazono-2,2,4,4-tetramethylthietane 1,1-dioxide