Methyl 6-diazo-5,6-dihydro-5-oxonaphthalene-1-sulphonate, Methylester der 1,2-Naphthochinondiazid-2(5)-sulfonsaeure, 1-Hydroxy-5-methoxysulfonyl-naphthalin-2-diazonium-betain, EINECS 261-688-8, 1,2-Naphthochinon-2-diazid-5-sulfonsaeuremethylester, methyl 6-diazo-5-oxo-5,6-dihydronaphthalene-1-sulfonate, 6-Diazo-5-oxo-5,6-dihydro-naphthalin-1-sulfonsaeure-methylester, 1-hydroxy-5-methoxysulfonyl-naphthalene-2-diazonium-betaine, methyl 2-diazo-1-oxo-1,2-dihydronaphthalene-5-sulphonate