Get Best Price for219924-29-52,2-Dimethyl-propionic acid (2R,3R,4S,5S,6R)-2-({(R)-1-[2-(tert-butyl-dimethyl-silanyloxymethyl)-phenylcarbamoyl]-2-phenyl-ethyl}-formyl-amino)-4,5-bis-(2,2-dimethyl-propionyloxy)-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-3-yl ester