Help getting filemask correct for rm command

Hi,
I have a requirement to remove files from a remote directory that meet the following conditions:

• are older than 3 days
  
• have an extension of *.pgp
  
• do NOT contain "KPG" in the file name
  

I can meet the first 2 criteria with the following:
But I'm unable to get the 3rd criteria to work. I've tried this but get an error message:
Is this possible to do with the rm command? Thank you for your time.

No, it's not possible. But It's not difficult to code this in more powerful language, like PowerShell, with use of WinSCP .NET assembly.
https://winscp.net/eng/docs/library_powershell