Synonyms: 4,7-Methano-1H-isoindole-1,3(2H)-dione,3a,4,7,7a-tetrahydro-5-(hydroxyphenyl-2-pyridinylmethyl)-2-(2-methylpropyl)-8-(phenyl-2-pyridinylmethylene)-,(3aa,4a,7a,7aa)- (9CI);5-Norbornene-2,3-dicarboximide, 5-(a-hydroxy-a-2-pyridylbenzyl)-N-isobutyl-7-(a-2-pyridylbenzylidene)- (7CI);5-Norbornene-2,3-dicarboximide, 5-(a-hydroxy-a-2-pyridylbenzyl)-N-isobutyl-7-(a-2-pyridylbenzylidene)-, endo-(8CI)