How is each compound related to the simple sugar D-erythrose? Is it an enantiomer, diastereomer, or identical?

How is the following compound related to the simple sugar D-erythrose? Is it an enantiomer, diastereomer, or identical?

How is the following compound related to the simple sugar D-erythrose? Is it an enantiomer, diastereomer, or identical?

How is each compound related to A? Is it an enantiomer, diastereomer, or identical?

How is each compound related to A? Is it an enantiomer, diastereomer, or identical?

How is each compound related to A? Is it an enantiomer, diastereomer, or identical?

How is each compound related to A? Is it an enantiomer, diastereomer, or identical?

Draw the enantiomer and a diastereomer for this compound.

Draw the enantiomer and a diastereomer for this compound.

Draw the enantiomer and a diastereomer for this compound.

Draw the enantiomer and a diastereomer for this compound.