(R)-1-((1R,5S,7S)-10,10-Dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]dec-4-yl)-4-[(2R,6R)-6-(2-methoxymethoxy-ethyl)-3,6-dihydro-2H-pyran-2-yl]-3-methyl-butan-1-one