DR. EHRENSTORFER

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2-Naphthol, 500mg

2-Naphthoxy acetic acid, 250mg

2-Nitroaniline, 250mg

2-Nitrobenzaldehyde, 0.1g

2-Nitrobenzoic acid, 100mg

2-Nitrobiphenyl 10 µg/mL in Cyclohexane, 10ml