4. Organic compounds -- part of the class 532-570 series
  5. Organic compounds
  6. Heterocyclic carbon compounds containing a hetero ring...

Chen-Yin Chen

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Ascorbic acid derivatives

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate

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Compound with carboxyl acid group and amide group and...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Radical -xh acid – or anhydride – acid halide or salt thereof...
Reexamination Certificate

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