Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2006-11-28
2006-11-28
Stockton, Laura L. (Department: 1626)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C548S302700
Reexamination Certificate
active
07141598
ABSTRACT:
The present invention provides a compound having a steroid C17,20-lyase-inhibitory activity and useful for the therapy and prophylaxis of tumor such as prostatism, breast cancer and the like, and a method for efficiently separating an optically active compound of this compound from a mixture of optical isomers thereof, a compound of the formula:wherein each symbol is as defined in the specification, a salt thereof or a prodrug thereof, and a method for obtaining an optically active compound by optically resolving a mixture of optical isomers by the use of a resolving agent such as tartranilic acid and the like.
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Golub et al., Science, vol. 286, Oct. 15, 1999, pp. 531-537.
Hitaka Takenori
Kusaka Masami
Matsunaga Nobuyuki
Tasaka Akihiro
Chao Mark
Ramesh Elaine M.
Stockton Laura L.
Takeda Pharmaceutical Company Ltd.
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