5-amino-2,3,6,7-tetrabromo-8-hydroxy-[1,4]naphthoquinone-1-imine
5-amino-2,3,7-tribromo-8-hydroxy-[1,4]naphthoquinone-1-imine
8-amino-2,6-dibromo-5-hydroxy-[1,4]naphthoquinone-4-imine
8-amino-2,6-dichloro-5-hydroxy-[1,4]naphthoquinone-4-imine
ammonia