| abstract |
ABSTRACT OF THE DISCLOSURE Compounds, and processes to make them, of the formula: or a pharmaceutically acceptable salt thereof, in which formula R1 and R2 are the same or different and each represents a hydrogen atom, a lower alkyl group or a halogen atom, R3 represents a lower alkyl group or a benzyl group, R4 represents a hydrogen atom, a lower alkyl group or a benzyl group, provid-ed that R1 and/or R2 represents a lower alkyl group or a halogen atom when R3 and R4 represents a methyl group. These compounds find use as anti-depressants. |