PHENOLSULPHONPHTHALEINYL-BETA-D-GALACTOSIDES, PROCEDURES FOR THEIR PREPARATION, USE THEREOF FOR THE DETERMINATION OF BETA-D-GALACTOSIDASE, AND A DIAGNOSTIC AGENT CONTAINING THESE

摘要

The present invention provides phenolsulphonphthaleinyl- beta -D-galactosides of the general formula: IMAGE (I) wherein R1 to R4, which can be the same or different, are hydrogen or halogen atoms or nitro or amino groups, R5 to R12, which can be the same or different, are hydrogen or halogen atoms or lower alkyl, hydroxyl, lower alkoxy, carboxyl or nitro groups and M+ is a proton, an alkali metal, alkaline earth metal or ammonium ion. The present invention also provides a process for preparing these galactosides and diagnostic agents containing them.