Patent classifications
C
CHEMISTRY; METALLURGY
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C12
BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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C12P
FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
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17/00
Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
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C12P17/16
containing two or more hetero rings
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C12P17/165
Heterorings having nitrogen atoms as the only ring heteroatoms
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