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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Reexamination Certificate



The present invention is directed to (S)-(−)-1-(4-fluoroisoquinolin-5-yl)sulfonyl-2-methyl-1,4-homopiperazine hydrochloride dihydrate, to a method producing the dihydrate, and to a drug composition containing the dihydrate. The compound of the present invention has less hygroscopicity as compared with (S)-(−)-1-(4-fluoroisoquinolin-5-yl)sulfonyl-2-methyl-1,4-homopiperazine hydrochloride anhydrous crystals and thus, exhibits excellent chemical stability.

patent: 6153608 (2000-11-01), Hidaka et al.
patent: 9 12573 (1997-01-01), None
patent: 97 02260 (1997-01-01), None
patent: 99 20620 (1999-04-01), None
patent: WO 99/20620 (1999-04-01), None


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