Chemical Name: (4S)-2-(carboxy(3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamido)methyl)-3-((4S)-2-(carboxy(3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamido)methyl)-5,5-dimethylthiazolidine-4-carbonyl)-5,5-dimethylthiazolidine-4-carboxylic acid, sodium salt