• 34970-34-8
    1-ethyl-3-methyl-4-oxo-4,7-dihydro-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid ethyl ester
  • 37801-47-1
    ethyl 4-chloro-1-ethyl-3-methylpyrazolo[3,4-b]pyridine-5-carboxylate
  • 参考文献

    E. R. Squibb and Sons, Inc. Patent: US4020072 A1, 1977 ;

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