| 摘要 |
Benzopyrans of the formula <IMAGE> wherein n represents 0 or 1, R is an alkyl group having 1 to 20 carbon atoms, an aryl-lower alkyl group or a cycloalkyl-lower alkyl group, R1 is hydrogen or <IMAGE> wherein R4 is lower alkyl, phenyl, cycloalkyl-lower alkyl or aryl-lower alkyl, R2 is a lower alkyl and R3 is hydrogen or one or two lower alkyl groups, pharmaceutical compositions containing the compounds, and uses of the compounds as tranquilizers and analgesics. |
