Export RTF or RTFD from Pages

I am able to export PDF from Pages using the following:

export doc to file (targetPath & fileNamePrefix & ".pdf") as PDF

However when trying to export to RTF or RTFD, eg,

export doc to file (targetPath & fileNamePrefix & ".rtf") as RTF

I get error:

“The variable RTF is not defined”

I have tried rtf RTD rtfd RTFD to no avail.

Model: Mac Mini
AppleScript: 2.10
Browser: Firefox 68.0
Operating System: macOS 10.13

The constant defined in the dictionary for RTF documents is formatted text.

Thanks! That did it.