Write the structural formula of 1-Phenlbutan-1-one.

Explanation

To write the structural formula of 1-Phenylbutan-1-one, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Base Chain**:
- The name "butan" indicates that we have a four-carbon chain. So, we will start by drawing a straight chain of four carbon atoms.
- Structure:
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