1,2,4,5-Benzenetetracarboxylic 1,2:4,5-diimide, N,N'-bis(4-(2-methylpiperidino)but-2-ynyl)- 77763-00-9 BRN 5677372 N,N'-Bis(4-(2-methylpiperidino)but-2-ynyl)-1,2,4,5-benzenetetracarboxylic 1,2:4,5-diimide