3-(2-Benzyloxycarbonylamino-ethoxy)-5-(2-tert-butoxycarbonylamino-ethoxy)-benzoic acid methyl ester

3-(2-tert-Butoxycarbonylamino-ethoxy)-5-(2-{3-[12-(4-nitro-phenylamino)-dodecyloxy]-5-[2-(4-nitro-phenylamino)-ethoxy]-benzoylamino}-ethoxy)-benzoic acid methyl ester