4-((4-Nitrophenyl)diazenyl)naphthalen-1-ol, 4-<p-nitrophenylazo>-1-naphthol, 4-<4-Nitro-phenylazo>-<1>naphthol, α-Naphthol Magneson, (4-Nitro-benzol)-(1 azo 4)-naphthol-(1), Magneson 2, 4'-NITROBENZENE-AZO-1-NAPHTHOL, MagnesoneII, P-NITROBENZENEAZO-A-NAPHTHOL, Magnezon II, MAGNESON II, 4-(4-Nitrophenylazo)-1-naphthol, 4-Hydroxy-1-<4-nitro-benzolazo>-naphthalin, 1-hydroxy-4-(4-nitrophenylazo)naphthalene