1-Bromo-2,7-di-tert-butylpyrene

5,13-di-tert-butyl-8,16-dimethyl[2,2]metacyclophan-1-ene

2,6 bis(mercaptomethyl)-4-tert-butyltoluene

6,15-di-t-butyl-anti-9,18-dimethyl-2,11-dithia[3.3]metacyclophane