IPIQ

CHEMISTRY; METALLURGY

C12

BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING

C12P

FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE

17/00

Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms

C12P17/18

containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin

C12P17/188

Heterocyclic compound containing in the condensed system at least one hetero ring having nitrogen atoms and oxygen atoms as the only ring heteroatoms