| 摘要 |
PCT No. PCT/JP91/01112 Sec. 371 Date Feb. 19, 1993 Sec. 102(e) Date Feb. 19, 1993 PCT Filed Aug. 22, 1991 PCT Pub. No. WO92/03438 PCT Pub. Date Mar. 5, 1992.Tricyclic compounds of the formula: <IMAGE> wherein R1 1 is hydrogen or an organic group, R2 is aryl which may have suitable substituent(s), R3 is hydrogen or an acyl group and A is lower alkylene, and pharmaceutically acceptable salts thereof which are useful as a medicament. |
