Hyaluronic acid-methotrexate conjugate

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C514S054000, C514S260100

Reexamination Certificate

active

07807675

ABSTRACT:
An object of the present invention is to provide a hyaluronic acid-methotrexate conjugate useful as a therapeutic drug for joint disorders. There is provided a hyaluronic acid-methotrexate conjugate useful for the treatment of joint disorders, wherein methotrexate is conjugated with a hydroxy group of hyaluronic acid through a linker containing a peptide chain consisting of 1 to 8 amino acids, and the linker is conjugated with the hyaluronic acid through a carbamate group.

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patent: 05-039306 (1993-02-01), None
patent: WO-94/19376 (1994-09-01), None
patent: WO-99/59603 (1999-11-01), None
Kenkyusho, abstract of JP 05-039306, Feb. 1993.
Chugai Seiyaku Kabushiki Kaisha, abstract of WO 02/44218, Jun. 2002.

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