4. Chemistry: molecular biology and microbiology
  5. Micro-organism, tissue cell culture or enzyme using process...
  6. Preparing heterocyclic carbon compound having only o, n, s,...

Raymond C. Yao

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A59770 antibiotics

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
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A80407 antibiotics

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing heterocyclic carbon compound having only o – n – s,...
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A80407 antibiotics

Drug – bio-affecting and body treating compositions – Fermentate of unknown chemical structure
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A80789 polyether antibiotic

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
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A82846 antibiotics

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing compound containing saccharide radical
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