D-glyceraldehyde + 3-hydroxypyruvate => (3R,4S,5R)-3,4,5,6-tetrahydroxy-2-oxohexanoate
d-glyceraldehyde + 3-hydroxypyruvate => (3r,4s,5r)-3,4,5,6-tetrahydroxy-2-oxohexanoate
D-glyceraldehyde + 3-hydroxypyruvate => (3R,4S,5R)-3,4,5,6-tetrahydroxy-2-oxohexanoate
d-glyceraldehyde + 3-hydroxypyruvate => (3r,4s,5r)-3,4,5,6-tetrahydroxy-2-oxohexanoate