20,24-Diamino-2,3:11,12-dibenzo-1,4,7,10,13,16-hexaoxacyclooctadeca-2,11-diene;4,4'-Diaminodibenzo-18-crown-6; trans-4,4'-Diaminodibenzo-18-crown-6;trans-Diaminodibenzo-18-crown-6
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