9. The compound according to claim 8 which contains at least 90% (w/w) R stereoisomer.
10. A therapeutic composition comprising an anticonvulsant effective amount of a compound according to any one of claims 1-9 and a pharmaceutical carrier therefor.
13. The method according to claim 12 wherein the mammal is a human.
然而,主要的化學構造是在第8項,現一併列出如下:
8. The compound according to claim 1 which is (R)-N-Benzyl 2-Acetamido-3-methoxypropionamide.
上訴法院援引了Otsuka案件[3] 「In cases involving the patentability of a new chemical compound, prima facie obviousness under the third Graham factor generally turns on the structural similarities and differences between the claimed compound and the prior art compounds.」 並表示我們藉由先驅化合物的分析來證明新的化學構造是可以由先前技術之化學構造而來的初步證明。上訴法院說明了先驅化合物的分析包含有兩個步驟的調查 (two-part inquiry),首先,是否會從先前技術公開的構造中選擇化學構造來當作先驅化合物「the court determines whether a chemist of ordinary skill would have selected the asserted prior art compounds as lead compounds, or starting points, for further development efforts.」 ,接著是,是否先前技術足以使得所屬領域中具通常技術之人有理由或動機改良先驅化合物來完成系爭專利化學構造「the court determines whether the prior art would have supplied one of ordinary skill in the art with a reason or motivation to modify a lead compound to make the claimed compound with a reasonable expectation of success.」。
Aventis Pharma Deutschland GmbH v. Lupin, Ltd., 499 F.3d 1293 (2007).
"structural similarity between claimed and prior art subject matter, proved by combining references or otherwise, where the prior art gives reason or motivation to make the claimed compositions, creates a prima facie case of obviousness. "
"if the prior art would provide a person of ordinary skill in the art with reason to believe [it had desirable properties], the purified compound is prima facie obvious over the mixture even without an explicit teaching that the ingredient should be concentrated or purified."