If you want to report only the results from the main peak, then you need to apply a filter to the compound results table to only show the content that you want. So, for example, if you were measuring Paracetamol the filter would look something like this:
Expression: Compound_Name LIKE "*Paracetamol*"
The expression is case-sensitive and uses wildcards to filter for anything that contains "Paracetamol"
you can also use
It filters everything, exept paracetamol