prov:value
| - (1) A compound for organic electroluminescent devices, having a basic skeleton represented by the following formula (I): wherein R1, R2, R3, and R4 each are a substituted or unsubstituted aryl or alkenyl group; R5, R6, R7, and R8 each are hydrogen; at least two of R1 to R4 are aryl groups which are at least bicyclic, aryl groups having aryl, amino, alkenyl, aryloxy or heterocyclic groups as substi
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