Draw two anomers of D-fructose.

Explanation

To draw the two anomers of D-fructose, we will follow these steps:

### Step 1: Understand the Structure of D-Fructose
D-fructose is a ketohexose, meaning it has six carbon atoms and a ketone functional group. In its cyclic form, fructose can exist in two anomeric forms based on the orientation of the hydroxyl group (-OH) at the anomeric carbon (carbon 2 in fructose).

### Step 2: Draw the Cyclic Structure of D-Fructose
1. Start by drawing a six-membered ring structure (furanose form) for D-fructose.
2. Place the ketone group at carbon 2.
3. The carbon atoms will be numbered from 1 to 6, with carbon 1 being the carbon that is part of the carbonyl group in the open-chain form.

### Step 3: Identify the Anomeric Carbon
In D-fructose, the anomeric carbon is carbon 2. The two anomers differ in the orientation of the hydroxyl group attached to this carbon.

### Step 4: Draw the Alpha Anomer (α-D-Fructofuranose)
1. In the alpha anomer, the hydroxyl group (-OH) on the anomeric carbon (C2) is positioned below the plane of the ring.
2. Draw the ring with the -OH group on carbon 2 pointing downwards.

### Step 5: Draw the Beta Anomer (β-D-Fructofuranose)
1. In the beta anomer, the hydroxyl group (-OH) on the anomeric carbon (C2) is positioned above the plane of the ring.
2. Draw the ring with the -OH group on carbon 2 pointing upwards.

### Step 6: Finalize the Structures
1. Ensure that all other substituents (like CH2OH on carbon 6) are correctly placed.
2. Label each structure clearly as α-D-fructofuranose and β-D-fructofuranose.

### Final Structures:
- **Alpha-D-Fructofuranose**: The -OH group on C2 is down.
- **Beta-D-Fructofuranose**: The -OH group on C2 is up.