申请人:Hoffmann-La Roche Inc.
公开号:US04630896A1
公开(公告)日:1986-12-23
Compounds of the formula: ##STR1## wherein one of X.sup.1 and X.sup.2 is --CH.sub.2 CH.sub.2 -- and the other is --CH.sub.2 CH.sub.2 -- or a single covalent bond, ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and R.sup.1 is straight-chain C.sub.1 -C.sub.12 -alkyl or when positioned on a 1,4-phenylene ring R.sup.1 may also be straight chain C.sub.1 -C.sub.12 -alkoxy.
化学式为:##STR1## 其中X.sup.1和X.sup.2中的一个是--CH.sub.2 CH.sub.2 --,另一个是--CH.sub.2 CH.sub.2 --或单个共价键,环A为1,4-苯基或顺-1,4-环己基,R.sup.1为直链C.sub.1-C.sub.12-烷基,或当位于1,4-苯基环上时,R.sup.1也可以是直链C.sub.1-C.sub.12-烷氧基。