attempting to find Maxima operators which are also Lisp macros

Hello,

I'm trying to determine which Maxima operators are also Lisp macros.
So far I have found ":" (more specifically MSETQ which is returned by
(GETOPR '&\:)) and lambda (more specifically LAMBDA, not $LAMBDA)
are Lisp macros.

(DO-SYMBOLS (S "MAXIMA") (IF (MACRO-FUNCTION S) (FORMAT T "~S~%" S)))
turns up a lot of stuff, but most, maybe all of them are symbols that
are not associated with Maxima functions or operators.
Restricting the search to symbols which begin with $ identifies
$SSTATUS and $MDEFVAR.

A brute force approach (grepping for DEF-NUD and DEF-LED
in nparse.lisp and attempting apply ("foo", [foo]) on each one)
identifies ":" and nothing else. For the record the operators tested were:
<= < = >= > - , ; := : ::= :: !  .) [ ] $ * && #
+ !!  ' '' ( [ ^ + and do else elseif for from
if next not or step then thru unless while

Is there a way to determine if a Maxima function or operator 
is associated with a symbol that is a Lisp macro?

Thanks for any advice --
Robert Dodier