1: With nicotinamide adenine dinucleotide; NADP; adenosine 5'-triphosphoric acid; tri-(hydroxymethyl)-methylamine; [14C]-Sucrose; glycosylation-deficient HEK-293S cells transfected with mouse retinal dehydrogenase type 2 (HEK-RALDH2 cells) T=37°C; pH=8.0; 2 h; Enzymatic reaction; 2: With hydroxylamine in water; acetonitrile T=20°C; pH=7.0; 0.5 h; 3: With ammonium acetate in water pH=4.0; Product distribution / selectivity;