| 摘要 |
PCT No. PCT/EP97/02402 Sec. 371 Date Nov. 6, 1998 Sec. 102(e) Date Nov. 6, 1998 PCT Filed May 13, 1997 PCT Pub. No. WO97/43272 PCT Pub. Date Nov. 20, 1997The invention thus provides compounds of Formula (I) wherein R1 and R2 which may be the same or different represent H, C1-6 alkyl or substituted alkyl or C3-7 cycloalkyl; or aryl; R3, and R4 which may be the same or different represent H, halogen, C1-6 alkyl; or substituted aryl; R5 is H or C1-6 alkyl; n is an integer 0, 1 or 2 and m is an integer 1, 2, 3, or 4; the dotted line indicates the presence or absence of an additional bond; and pharmaceutically acceptable solvates (e.g. hydrates) thereof. |
