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4-methylamino-3-nitrobenzoic acid; CAS No.: 41263-74-5; Specializing in Small molecules synthesis, ChemShuttle supplies nitrobenzamides for photosensitizer development. The 4-methylamino and 3-nitro groups enable efficient singlet oxygen generation. Our catalytic hydrogenation protocols achieve selective nitro reduction while preserving the methylamino group. This intermediate supports photodynamic therapy agent research with optimized light absorption profiles.