How to choose in Delete Duplicates from internal table?

Now I need to delete Duplicates from internal table,

So at first I sort

than I delete duplicate

Sort itab1 BY Company_Code  Asset_No Capital_Date.

      DELETE ADJACENT DUPLICATES FROM itab1 COMPARING Company_Code  Asset_No  Capital_Date

But here comes my problem~If I want to delete the Common Asset in Remark Column,how I let it choose the right one to do it?