Specifications

The Patent Office Journal 17/12/2010
4597
(12) PATENT APPLICATION PUBLICATION (21) Application No.3989/CHENP/2010 A
(19) INDIA
(22) Date of filing of Application :28/06/2010 (43) Publication Date : 17/12/2010
(54) Title of the invention : POLYMORPHIC FORMS OF OSELTAMIVIR PHOSPHATE
(51) International classification :C07C231/22
(31) Priority Document No :08150057.1
(32) Priority Date :04/01/2008
(33) Name of priority country
:EUROPEAN
UNION
(86) International Application No
Filing Date
:PCT/EP08/068219
:23/12/2008
(87) International Publication No
:WO 2009/087062
A3
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(71)Name of Applicant :
1)F.HOFFMANN-LA ROCHE AG
Address of Applicant :124 GRENZACHERSTRASSE,CH-
4070 BASEL. Switzerland
(72)Name of Inventor :
1)BUBENDORF ANDRE
2)GOLDBACH PIERRE
3)GRASSMANN OLAF
4)HENNIG MICHAEL
5)SAUER INES
6)TRUSSARDI RENE
(57) Abstract :
The present invention relates to polymorphic forms of Oseltamivir phosphate, especially especially the (3R,4R,5S)-5-amino-4-
acetylamino-3-(1-ethyl-propoxy)-cyclohex-1 -ene- carboxylic acid ethyl ester phosphate, which is a potent inhibitor of viral
neuraminidase.
No. of Pages : 25 No. of Claims : 17