Hydrogen 3,6-bis(diethylamino)-9-(2,4-disulphonatophenyl)xanthylium, compound with N,N'-diphenylguanidine (1:1);4-[3,6-bis(diethylamino)xanthen-10-ium-9-yl]benzene-1,3-disulfonate; 1,3-diphenylguanidine
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