IUPAC name of the compound is-
`CH_(3)CH_(2)CH_(2)CH_(2)CH_(2) -underset(CH_(3))underset(|)CH-overset(CH_(3))overset(|)underset(CH_(2)CH_(2)CH_(3))underset(|)C-CH_(2)CH_(3)`

Explanation

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

### Step 1: Identify the Longest Carbon Chain
First, we need to identify the longest continuous carbon chain in the structure. In this case, we can count the carbon atoms in the longest chain, which consists of 10 carbon atoms.

### Step 2: Number the Carbon Chain
Next, we will number the carbon chain. We will start numbering from the end that gives the substituents the lowest possible locants. In this case, numbering from the left gives us the following:
1. C1
2. C2
3. C3
4. C4
5. C5
6. C6
7. C7
8. C8
9. C9
10. C10

### Step 3: Identify and Name the Substituents
Now, we will identify the substituents attached to the main carbon chain:
- At C4, there is an ethyl group (C2H5).
- At C4, there are two methyl groups (C1H3).
- At C5, there is another methyl group.

### Step 4: Assign Locants to the Substituents
We will assign locants to the substituents based on their positions:
- Ethyl group at C4
- Two methyl groups at C4 (which we will denote as "dimethyl").
- One methyl group at C5.

### Step 5: Combine the Names of the Substituents
When combining the names of the substituents, we will list them in alphabetical order, ignoring the prefixes (di-, tri-). Therefore, we have:
- Ethyl (E) at C4
- Dimethyl (D) at C4

### Step 6: Write the Complete IUPAC Name
Finally, we will write the complete IUPAC name. The parent chain is "decane" (10 carbon atoms), and we will include the substituents:
- The complete IUPAC name is: **4-Ethyl-4,5-dimethyldecane**.

### Summary of the IUPAC Name
The IUPAC name of the compound is **4-Ethyl-4,5-dimethyldecane**.

---