1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene;2,4,5-Triphenyl-1,2,4-triazol-3-ylidene; 2,4-Dihydro-2,4,5-triphenyl-3H-1,2,4-triazol-3-ylidene
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