guanidine + (S)-2-amino-6-oxohexanoate => 6-hydroxy-L-homoarginine
guanidine + (s)-2-amino-6-oxohexanoate => 6-hydroxy-l-homoarginine
guanidine + (S)-2-amino-6-oxohexanoate => 6-hydroxy-L-homoarginine
guanidine + (s)-2-amino-6-oxohexanoate => 6-hydroxy-l-homoarginine