el good ' s ▁ 1 9 8 9 ▁compilation ▁album , ▁Singles ▁- ▁The ▁U A ▁Years . ▁ ▁References ▁ ▁External ▁links ▁Single ▁details ▁at ▁Discogs . com ▁ ▁Category : 1 9 7 9 ▁singles ▁Category : Music ▁in ▁South end - on - Se a ▁Category : Dr . ▁Fe el good ▁( band ) ▁songs <0x0A> </s> ▁Dis od ium ▁ 4 , 4 ′ - d init rost il b ene - 2 , 2 ′ - dis ulf on ate ▁is ▁an ▁organ ic ▁comp ound ▁with ▁the ▁formula ▁( O 2 NC 6 H 3 ( SO 3 Na ) CH ) 2 ▁This ▁salt ▁is ▁a ▁common ▁prec ursor ▁to ▁a ▁variety ▁of ▁text ile ▁d yes ▁and ▁optical ▁bright en ers ▁ ▁Pre par ation ▁and ▁re actions ▁The ▁synth esis ▁of ▁dis od ium ▁ 4 , 4 ′ - d init rost il b ene - 2 , 2 ′ - dis ulf on ate ▁begins ▁with ▁sul fon ation ▁of ▁ 4 - nit rot olu ene . ▁This ▁reaction ▁aff ords ▁ 4 - nit rot olu ene - 2 - s ulf onic ▁acid . ▁ ▁Ox id ation ▁of ▁this ▁species ▁with ▁sod ium ▁hy po ch lor ite ▁yields ▁the ▁dis od ium ▁salt ▁of ▁ 4 , 4 ′ - d init rost il b ene - 2 , 2 ′ - dis ulf onic ▁acid . ▁▁ ▁The ▁product ▁is ▁useful ▁as ▁its ▁reaction