Hexanoic acid, 6-[[5-[(3aS,4S,6aR)-hexahydro-2-oxo-1H-thieno[3,4-d]imidazol-4-yl]-1-oxopentyl]amino]-, 2,5-dioxo-3-sulfo-1-pyrrolidinyl ester, sodium salt (1:1)

Hexanoic acid, 6-[[5-[(3aS,4S,6aR)-hexahydro-2-oxo-1H-thieno[3,4-d]imidazol-4-yl]-1-oxopentyl]amino]-, 2,5-dioxo-3-sulfo-1-pyrrolidinyl ester, sodium salt (1:1)