1-(4,6-Dimethoxy-1,2-dihydro-1,3,5-triazin-2-ylidene)-2-(4,6-dimethoxy-1,3,5-triazin-2-yl)cyclopenta-2,4-diene;2-[2-(4,6-Dimethoxy-1,3,5-triazin-2-yl)-2,4-cyclopentadien-1-ylidene]-1,2-dihydro-4,6-dimethoxy-1,3,5-triazine
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