Succinoylamino hydroxyethylamino sulfonyl urea derivatives useful as retroviral protease inhibitors
申请人:G.D. Searle & Co.
公开号:US06337398B1
公开(公告)日:2002-01-08
Succinoylamino hydroxyethylamino sulfonyl urea derivatives of the formula:
wherein the substituents are as defined in the specification, are effective as retroviral protease inhibitors, and in particular as inhibitors of HIV protease.
An olefin polymerization catalyst and a polyolefin production method
申请人:TOKUYAMA CORPORATION
公开号:EP0739907A1
公开(公告)日:1996-10-30
An olefin polymerization catalyst comprises:
(A) a solid titanium catalyst component comprising a magnesium atom, titanium atom, halogen atom and electron donor in which divalent titanium atoms account for not more than 25 atomic % of the whole titanium atom content and trivalent titanium atoms account for at least 30 atomic % of the whole titanium atom content; and
(B) an organoaluminum compound component having no halogen atom.