cyclo((D-valyl-L-lactoyl-L-alanyl-D-hydroxyisovaleryl)2(D-valyl-L-lactoyl-L-valyl-D-hydroxyisovaleryl))
cyclo((d-valyl-l-lactoyl-l-alanyl-d-hydroxyisovaleryl)2(d-valyl-l-lactoyl-l-valyl-d-hydroxyisovaleryl))