Stereoisomers of Pyranose Monosaccharides
The yellow shaded box contains the structure of a pyranose aldohexose. Beneath that are the structures of four different stereoisomers, labled A through D. The questions posed below the formulas concern the structural relationship of the shaded reference structure to each of the other four.

| 1. Which of the formulas (A to D) is an anomer of the reference structure? Enter appropriate letters or X for none | ||
| 2. Which of the formulas (A to D) is an epimer of the reference structure? Enter appropriate letters or X for none | ||
| 3. Which of the formulas (A to D) is a diastereomer of the reference structure? Enter appropriate letters or X for none |