Lincosamide derivatives and antimicrobial agents comprising...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Carbohydrate doai

Reexamination Certificate

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C536S016200, C536S016300, C536S016400, C536S016500

Reexamination Certificate

active

07867980

ABSTRACT:
An objective of the present invention is to provide compounds of formula (I) or their pharmacologically acceptable salts or solvates wherein A represents aryl while R1represents a five- or six-membered monocyclic heterocyclic group, or A represents a four- to six-membered monocyclic heterocyclic group while R1represents aryl or a five- or six-membered monocyclic heterocyclic group; R2represents a hydrogen atom or C1-6alkyl; R3represents C1-6alkyl or C3-6cycloalkyl-C1-4alkyl; R4, R5, and R6represent a hydrogen atom; R7represents C1-6alkyl; and m is 1 to 3. The compounds are novel lincosamide derivatives that have a potent activity against resistantStreptococcus pneumoniae. Further, the compounds are usable as antimicrobial agents and are useful for preventing or treating bacterial infectious diseases.

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