Draw the structural formula for the following:
3-Methyl but-1-yne

Explanation

To draw the structural formula for 3-methylbut-1-yne, we will follow these steps:

### Step 1: Identify the parent chain
The name "but-1-yne" indicates that the parent chain has four carbon atoms (but-). The "1-yne" indicates that there is a triple bond starting at the first carbon.

### Step 2: Draw the carbon backbone
We will draw a straight chain of four carbon atoms:
```
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