(2R,4aR,5S,8aR)-5-((Z)-2-(4-carboxyphenyl)-2-chlorovinyl)-7-methyl-2-(2-((4-((4-methylphenyl)sulfonamido)benzoyl)oxy)ethyl)-1,5,8,8a-tetrahydronaphthalene-4a(2H)-carboxylic acid