2-bromo-5-methylnaphthalene-1,4-dione

2-(4-氧代-2,5-环己二烯-1-亚基)氨基甲酰肼

(1Z,4Z)-N,N'-二苯基-2,5-环己二烯-1,4-二亚胺

2-(4-chlorophenyl)sulfonylbenzene-1,4-diol

4A,5,8,8a-四氢-[1,4]萘醌