86668-65-7
rac-(7R,7aR,8aS,12aR,13aS,13bS)-2,2-di-tert-butyl-7-((tert-butyldimethylsilyl)oxy)-10-((4-methoxyphenyl)sulfinyl)-5',5'-dimethyl-7,7a,8,8a,9,10,12,12a,13a,13b-decahydro-11H-spiro[tetraceno[1,12-de][1,3,2]dioxasiline-13,2'-[1,3]dioxan]-11-one