| abstract |
Compounds of formula (I):n n (in which: R¹ is alkyl; R² and R³ are each alkyl or alkoxy, or R² and R³ together form an optionally substituted benzene ring and, when R² and R³ together form said benzene ring, R¹ is hydrogen, halogen or alkyl; R⁴ and R⁵ are both hydrogen, or together represent a single carbon-carbon bond; W is a single bond or alkylene; and Z is hydrogen or a cation) have valuable therapeutic and prophylactic activities, including anti-diabetic activities. |