Patent ID: 9487503
Filing Date: 2016-11-08
CPC Classification: C07C,C07D,D06L,D21H

Claim Text:
1. Compounds of formula (I) wherein n is 0, 1 or 2; Y is H, C1-C4 alkyl, LOOM, —CO—CH3, —SO2-NH2, —CN; m is 0, 1 or 2; R, R1, R2, R3, which can be the same or different, are H, methyl, ethyl; the M groups are independently H, Li, Na, K, Ca, Mg, ammonium, protonated ions deriving from alkylamines, alkanolamines or alkylalkanolamines; A is selected from the group consisting of H, C1-C8 alkyl, C3-C8 cycloalkyl, C1-C8 hydroxyalkyl, alkoxyalkyl, phenyl, alkylphenyl, the side chain of an amino carboxylic or sulphonic acid in which the carboxylic or sulphonic groups are salified with the M group as defined above, or the SO3M group, M being as defined above; the hydrated forms thereof, either solid or in powder.