9-芴酮

四苯基环戊二烯酮

2,6-Di-tert-butyl-4-(3,5-di-tert-butyl-4-oxo-cyclohexa-2,5-dienylidenemethyl)-phenol anion

7,7,8,8-四氰基对苯二醌二甲烷

Methyl Violet chloride