PATENT ASSIGNEE'S COUNTRY | USA |
UPDATE | 03.99 |
PATENT ASSIGNEE | Merck (Rahway; NJ) |
PATENT CLAIMS |
17Beta-(N-tert-butylcarbamoyl)-4-aza-5alpha-androst-1-en- -3-one existing in polymorphic Form II prepd by - Crystallization from mixt of finasteride in organic solvent & water; solvent & water in amounts sufficient to cause the soly of solvated form to be exceeded & solvated form to be less soluble than any other form in mixt - Recovering resultant solid phase - Removing solvent |
PATENT PHOTOCOPY | Available on request |
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