1: H2O; methanol 2: 55 percent / oxygen, 0.5 M phosphate buffer / 0.17 h / pH 7.6 View Scheme

sodium tetrahydroborate 1.) 0.2 M phosphate buffer, pH = 6.0, 1 min. 2.) sodium borohydride; Yield given. Multistep reaction. Yields of byproduct given;