| 摘要 |
Antitussives containing as the active ingredient tricyclic compounds represented by the general formula (I) or pharmacologically acceptable salts thereof: (I) wherein R1 is hydrogen, substituted or unsubstituted lower alky l, or the like; X1-X2-X3 is CR5=CR6-CR7=CR8 (wherein R5, R6, R7 and R8 are each independently hydrogen, substituted or unsubstituted lower alkyl, or the lik e) or the like; Y is -CH2S- or the like; and R2 is hydrogen, substituted or unsubstituted lower alkyl, or the like.
|
