134-47-4 
 
22511-21-3 
 
2-{4-6-(3-{6-4-(1,2-dicarboxy-ethyl)-phenylazo-5-hydroxy-7-sulfo-naphthalen-2-yl}-ureido)-1-hydroxy-3-sulfo-naphthalen-2-ylazo-phenyl}-succinicacid 
[1]BioorganicChemistry,2000,vol.28,p.140-155
[1]Manoni,Francesco;Cornaggia,Claudio;Murray,James;Tallon,Sean;Connon,StephenJ.[ChemicalCommunications,2012,vol.48,#52,p.6502-6504]