6-Hydroxy-1-(3-methoxypropyl)-4-methyl-5-((4-(phenoxysulfonyl)phenyl)azo)-3-pyridinecarbonitrile 72152-88-6 Benzenesulfonic acid, 4-((5-cyano-1,6-dihydro-2-hydroxy-1-(3-methoxypropyl)-4-methyl-6-oxo-3-pyridinyl)azo)-, phenyl ester EINECS 276-424-7 Phenyl 4-((5-cyano-1,6-dihydro-2-hydroxy-1-(3-methoxypropyl)-4-methyl-6-oxo-3-pyridyl)azo)benzenesulphonate