((6a'R,7'S,9a'S,Z)-7'-(hydroxymethyl)-5-methyl-3',6',6a',7',9',9a'-hexahydrodispiro[[1,3]dioxane-2,2'-cyclopenta[b]oxocine-8',2''-[1,3]dithiolan]-5-yl)methyl benzoate

(Z)-5-((S)-4-Carboxymethyl-5-oxo-5,6,7,7a-tetrahydro-1H-inden-1-yl)-pent-3-enoic acid