2,7-di-tert-butyl-4,5,9,10-tetraphenylbenzo<1,2:4,5>dicyclobutadiene
C22H20O3
3,6-Di-tertbutyl-1,5,8-triphenyl-6-phenylaethinyl-octadien-3,4-in-7-diol-(1,2)
3,6-Di-tertbutyl-1,5,8-triphenyl-6-phenylaethinyl-octadien-3,4-in-7-dion-(1,2)
2,6-Diphenyl-4-tert.butyl-hexadien-2,3-in-5-saeure