| 摘要 |
PCT No. PCT/SE90/00806 Sec. 371 Date Aug. 7, 1991 Sec. 102(e) Date Aug. 7, 1991 PCT Filed Dec. 5, 1990 PCT Pub. No. WO90/07490 PCT Pub. Date Jul. 12, 1990. <IMAGE> (I) A compound of formula (I), wherein X is O, CH2, S, SO or SO2; R is F or Cl; R1 is H, C1-C6 alkyl or C2-C6 alkenyl; R2 is H, C1-C6 alkyl or C2-C6 alkenyl; R3 is H, C1-C6, alkyl, a pharmaceutically acceptable salt thereof, an enantiomer thereof, and a pharmaceutically acceptable salt of said enantiomer for use in therapy. A pharmaceutical preparation containing as active ingredient any one of said compounds. A process for the preparation of a compound of formula (I). |
