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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A61K31/16
Amides, e.g. hydroxamic acids
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A61K31/17
having the group >N—C(O)—N< or >N—C(S)—N<, e.g. urea, thiourea, carmustine
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A61K31/175
having the group , >N—C(O)—N=N— or , e.g. carbonohydrazides, carbazones, semicarbazides, semicarbazones; Thioanalogues thereof
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