1.1: 76 percent / I2 / ethanol / 0 °C 2.1: β-(1->3)-N-acetylglycosaminyltransferase; MnCl2; cacodylate buffer / 72 h / 37 °C / pH 7.4 3.1: NaBH4 4.1: hexa-bromo-polyethylene glycol 6000; aq. NaOH / 48 h / 20 °C 4.2: bovine milk D-GlcNAc β-(1->4)galactosyltransferase; UDP-glucose epimerase; HEPES buffer / MnCl2 / 48 h / 37 °C / pH 7.5 4.3: 18 mg / mercuric(II) trifluoroacetate; aq. HOAc / 2 h / 20 °C View Scheme

Multistep reaction.;

Multistep reaction.;

Multistep reaction. Further byproducts.;