| 摘要 |
A compound of formula (I), wherein R 1 is haloalkyl, alkenyl, phenyl, thienyl, pyridine, benzthiazolyl, chromanyl (1,2-dihydrobenzopyranyl) or (C6-18)aryl, and R 1 or R2 independently of each other are substituted (C4- 8)cycloalkyl, a substituted bridged cycloalkyl system, substituted piperidine, substituted tetrahydropyridine, or a substituted bridged heterocyclic system, useful as a pharmaceutical.
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