1H-cyclohepta[1,2-d:3,4-d']diimidazole-2,8-diamine, N~2~,N~8~,N~8~,1,4-pentamethyl-;N~2~,N~8~,N~8~,1,4-Pentamethyl-1H-imidazo[4',5':3,4]cyclohepta[1,2-d]imidazole-2,8-diamine
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