(9R,10S,11R)-12-Benzyloxy-10-(tert-butyl-dimethyl-silanyloxy)-9,11-dimethyl-dodec-1-en-6-one

(E)-(10R,11S,12R)-13-Benzyloxy-11-(tert-butyl-dimethyl-silanyloxy)-10,12-dimethyl-7-oxo-tridec-2-enoic acid ethyl ester