(2R,3S)-2-((4R,5S,6S)-2,2-di-tert-butyl-6-((R)-1-hydroxypropan-2-yl)-5-methyl-1,3,2-dioxasilinan-4-yl)pentan-3-ol

(S)-2-((4R,5R,6R)-2,2-di-tert-butyl-6-((2R,3S)-3-hydroxypentan-2-yl)-5-methyl-1,3,2-dioxasilinan-4-yl)-1-((3aR,6S,7aS)-8,8-dimethyl-2,2-dioxidotetrahydro-3H-3a,6-methanobenzo[c]isothiazol-1(4H)-yl)propan-1-one