Patent classifications
A
HUMAN NECESSITIES
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A61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
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A61K
PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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31/00
Medicinal preparations containing organic active ingredients
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A61K31/21
Esters, e.g. nitroglycerine, selenocyanates
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A61K31/235
having an aromatic ring attached to a carboxyl group
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