Compound A is a trisaccharide which is found mainly in the cotton seed. It does not react with Benedict or Fehling. The acid-catalyzed hydrolysis gives rise to three different D-hexoses: B, C, and D. Compound B and C give rise to the same osazone (see below) when they react in excess acid with phenylhydrazine. Compound D reacts with nitric acid to give compound E, which is optically inactive. However, it was shown that D is not D-Alose. When B is treated with nitric acid, it produces an optically active compound. It is known that B can react with Br2 / H2O, unlike C, which cannot react with this reagent. B is an epimer of D. Methylation of A and subsequent hydrolysis gives rise to a 2,3,4-tri-O-methyl-D-hexose (derived from B), a 1,2,3,4,6-tetra-O-methyl-D-hexose (derived from C), and a 2,3,4,6-tetra-O-methyl-D-hexose (derived from D). Draw the structure of the possible trisaccharide.