| abstract |
A pharmaceutically-active compound of the formulan in which R¹ is C₁₋₄ alkylthio, C₁₋₄ alkylsulphinyl or C₁₋₄ alkylsulphonyl, R² is C₁₋₄ alkyl, R³ is C₁₋₄ alkyl or C₂₋₄ alkenyl, and X is (i) -(CH₂) n N(R⁴)₂ where each R⁴ independently is C₁₋₄ alkyl, C₂₋₄ alkenyl or optionally substituted C₆H₅CH₂-, and n is 1, 2 or 3, or (ii) a 5- to 8-membered alicyclic group containing one or two nitrogen atoms and directly attached to the amido nitrogen or attached by a C₁₋₃ alkylene chain; and salts thereof. |