2-[4-(acetylanilino)-1,3-butadienyl]-3-(3-sulphonatobutyl)naphtho[2,3-d]thiazolium;4-[[2-[4-(Acetylphenylamino)-1,3-butadienyl]naphtho[2,3-d]thiazol-3-ium]-3-yl]-2-butanesulfonate
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