TETOMILAST POLYMORPHS Russian patent published in 2011 - IPC C07D417/04 A61K31/4439 A61K31/4436 A61K31/425 A61K31/427 A61P11/00 A61P11/06 A61P1/04 

Abstract RU 2408597 C2

FIELD: chemistry.

SUBSTANCE: invention relates to a novel anhydrous tetomilast type A crystalline form, having powder X-ray diffraction spectrum essentially the same as the powder X-ray diffraction spectrum having characteristic peaks at 2θ = 10.5°, 13.1°, 18.4°, 21.9° and 25.8°, pharmaceutical compositions based thereon and synthesis methods thereof.

EFFECT: considerable advantages in terms of industrial production owing to significantly better filterability.

8 cl, 14 dwg, 8 ex

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RU 2 408 597 C2

Authors

Aoki Satosi

Nakaja Kendzi

Sota Masakhiro

Isigami Masasi

Dates

2011-01-10Published

2007-03-15Filed