[4-((1r,2s,3r,5s)-3-(Tert-butyl-dimethyl-silanyloxy)-2-{4-[(tert-butyl-dimethyl-silanyloxy)-cyclohexyl-methyl]-phenyl}-5-hydroxy-cyclopentyl)-but-2-ynyloxy]-acetic acid methyl ester (HCID 91604517)|Huagongshe