4-benzyl-2,6-dihydroxy-4-aza-heptylene bis (2,2-dimethyloctanoate)
6,6'-bis(diazo-5,5',6,6'-tétrahydro-5,5'-dioxo)[méthylène-bis(5-(6-diazo-5,6-dihydro-5-oxo-1-naphtylsulfonyloxy)-6-méthyl-2-phénylène]di(naphtalène-1-sulfonate)