1,4,5,8-Tetrahydro-4a,8a-(methaniminomethano)naphhlalene-9,11-dione 1,4,5,8-Tetrahydro-4a,8a-naphthalenedicarboximide 16609-40-8 4a,8a-(Methaniminomethano)naphthalene-9,11-dione, 1,4,5,8-tetrahydro- (9CI) 4a,8a-NAPHTHALENEDICARBOXIMIDE, 1,4,5,8-TETRAHYDRO- BRN 1531498