1,3-Diazaspiro(4.4)nonane-6-heptanoic acid, 7-hexyl-2,4-dioxo-, monosodium salt, (5R-(5alpha,6alpha,7beta))-
1,3-diazaspiro(4.4)nonane-6-heptanoic acid, 7-hexyl-2,4-dioxo-, monosodium salt, (5r-(5alpha,6alpha,7beta))-