78472-95-4 BENZOIC ACID, 4,4'-(5-(3,4-DIMETHOXYBENZYLIDENE)-2,4,6-TRIOXOHEXAHYDROPYRIMIDIN- Benzoic acid, 4,4'-(5-(3,4-dimethoxybenzylidene)-2,4,6-trioxohexahydropyrimidin-1,3-diyl)bis(2-nitro-, dipotassium salt