(2r)-2-phenyl-2-[(2s,3r,4s,5s,6r)-3,4,5-trihydroxy-6-[[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxyacetic Acid