Write the IUPAC names of the following compounds :
`CH_3 - overset(CH_3) overset(|) CH - CH_2 - CH_2 - overset(O ) overset( ||)C-CH_2 Cl`

Explanation

To derive the IUPAC name of the given compound, we will follow these steps:

### Step 1: Identify the longest carbon chain
The first step is to identify the longest continuous carbon chain in the compound. In this case, the longest chain consists of 6 carbon atoms.

### Step 2: Number the carbon chain
Next, we need to number the carbon chain. We start numbering from the end closest to the functional group. The functional group here is a ketone (C=O). Thus, we number the chain as follows:
1. C1
...