Briefly, oligosaccharides were dissolved in 5 L DMSO-acetic acid (7:3) containing 2AB (0.35 M)and 1 M NaCNBH3 and incubated at 65◦C for 2 h. Excess of fluo-rophore was removed by 2 h vertical chromatography on Whatman3 MM paper using acetonitrile. The paper bearing the oligosac-charide signal (application point) was cut. The oligosaccharides were eluted from the paper by adding double-distilled water(2 × 500 L). The eluate was filtrated in a syringe through a 0.45 mPTFE filter (Millex-LCR, Millipore) and then concentrated undervacuum.