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Die  suspension  von 20 g Barbitursaure in 50 rnl Wasser wird mit 50 g Brom tropfenweise bis zur
bleibenden Gelbfarbung versetzt. Nach 2 h Riihren wird auf 0¡ãC abgekuhlt, abgesaugt, mit
wenig Eiswasser nachgewaschen und an der Luft getrocknet. Umkristallisiert wird aus Methanol/Toluol.
Ausb. 41.4 g (92%), Schmp. 235 - 237¡ãC (Zers.).

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