. . . "xylobiose" . . . . "Xylobiose" . . . "Xylobiose" . . . . "(2R,3R,4R)-2,3,5-Trihydroxy-4-[(2S,3R,4S,5R)-3,4,5-trihydroxyoxan-2-yl]oxypentanal" . . . .