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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A61K31/683
Diesters of a phosphorus acid with two hydroxy compounds, e.g. phosphatidylinositols
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A61K31/688
both hydroxy compounds having nitrogen atoms, e.g. sphingomyelins
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