File Entry: SILDENAFIL CITRATE (Viagra) IN ITS POLYMORPHIC FORMS
Created: 2013-04-08 05:17:04
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| Title | SILDENAFIL CITRATE (Viagra) IN ITS POLYMORPHIC FORMS |
| File name | SILDENAFIL CITRATE final.pdf |
| File size | 2310757 |
| SHA1 | 0f1697d22d221f5f215b0a941e8c3ade570c20de |
| Content type | Adobe PDF |
Description
AN IMPROVED PROCESS FOR THE PREPARATION OF SILDENAFIL CITRATE (Viagra) IN ITS POLYMORPHIC FORM
The present invention provides an improved process for preparation of 1-[[3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H –pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulphonyl]-4methypiperazine citrate (Sildenafil Citrate) of
Polymorphic form I)
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