| 摘要 |
Compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein A1, A2, A3 and the carbon atoms to which they are attached form a 5- or 6-membered non-aromatic heterocyclic ring containing at least one -O-, -CO- or -N-; R1 and R2 are hydrogen or C1-6 alkyl; Y is hydrogen, halo, C1-6 alkyl or C1-6 alkoxy; L is O or NH; Z is an azabicyclic side chain; having 5-HT3 receptor antagonist activity. |
