Compounds of the general formulae ##STR1## in which R.sub.1 represents a straight or branched, optionally substituted alkyl, alkenyl or alkynyl radical; R.sub.2 stands for an optionally substituted phenyl radical; Y stands for oxygen, sulphur or a methylene radical; X stands for O or H.sub.2 ; their salts and esters and methods for their preparation. The compounds of the invention possess an outstanding diuretic and saluretic activity with a very low excretion of potassium ions and a low toxicity.
通式##STR1##中,R.sub.1代表直链或支链、可选择取代的烷基、烯基或炔基基团;R.sub.2代表可选择取代的苯基基团;Y代表氧、
硫或亚甲基基团;X代表O或H.sub.2;它们的盐和酯以及它们的制备方法。本发明的化合物具有出色的利尿和排
钠活性,
钾离子排泄量极低,毒性低。