7-((4R,5S,4'R,5'S)-5'-Hydroxymethyl-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-heptanoic acid ethyl ester

7-[(4R,5S,4'S,5'R)-5'-(Bis-ethylsulfanyl-methyl)-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl]-heptanoic acid ethyl ester