acetone + 3-oxopropanoate => (S)-3-hydroxy-5-oxohexanoate
acetone + 3-oxopropanoate => (s)-3-hydroxy-5-oxohexanoate
acetone + 3-oxopropanoate => (S)-3-hydroxy-5-oxohexanoate
acetone + 3-oxopropanoate => (s)-3-hydroxy-5-oxohexanoate