Write the structure of monomers used for getting the following polymers:
Nylon 6, 6

Explanation

To determine the monomers used to synthesize Nylon 6,6, we need to identify the specific compounds that react to form this polymer. Nylon 6,6 is a type of polyamide, which is formed through a condensation reaction between a dicarboxylic acid and a diamine.

### Step 1: Identify the Monomers
The two monomers that are used to produce Nylon 6,6 are:
1. **Adipic Acid**
2. **Hexamethylenediamine**

### Step 2: Write the Structure of Adipic Acid
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