64173-52-0 2H-Naphth[2,3-f]isoindole-2-butanoic acid,4,11-diamino-1,3,5,10-tetrahydro-1,3,5,10-tetraoxo-, butyl ester 106308-20-7 Benzoic acid,4-(4,9-diamino-1,3,5,10-tetrahydro-6,11-dihydroxy-1,3,5,10-tetraoxo-2H-naphth[2,3-f]isoindol-2-yl)-, [1,1'-biphenyl]-4-yl ester