You could use this formula:
Formula: copy to clipboard
=RIGHT(F1,LEN(F1)-FIND("|",SUBSTITUTE(F1,":","|",LEN(F1)-LEN(SUBSTITUTE(F1,":","")))))



Or you could use a small UDF:
Function RightText(ByVal MyText As String, MyCharacter As String)
    RightText = Right(MyText, Len(MyText) - InStrRev(MyText, MyCharacter))
End Function
Which can be used as:
Formula: copy to clipboard
=RightText(F1,":")