(5R)-5-ethyl-3-isopropoxy-5-methyl-4-[4-(methylsulfonyl)phenyl]furan-2(5H)-thione

(5R)-3,4-bis(benzyloxy)-5-((2S,7R)-7-ethyl-9-isopropoxy-7-methyl-8-(4-(methylsulfonyl)phenyl)-1,4,6-trioxaspiro[4.4]non-8-en-2-yl)furan-2(5H)-one