Number | Date | Country | Kind |
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100 22 829 | May 2000 | DE |
Number | Date | Country |
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196 07 751 | Sep 1997 | DE |
100 00 460 | Aug 2001 | DE |
0151019 | Jul 2001 | WO |
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Anna Maria Almerico et al. Polycondensed Nitrogen Heterocycles. (J. Heterocyclic Chem., 31, 193 (1994).* |
J. Heterocyclic Chem., 31 (1984), pp. 193-198. |