I guess I don’t understand what you want.
In my world, Cm7(9) = Cmin7(9) = C-7(9) = C-9 = 1,b3,5,b7,9 (no b6)
https://www.oolimo.com/guitarchords/Cm7(9)
Please confirm the scale notes you want in your chord.
eg. 1,b3,5,b6,9
Perhaps you could write your chord C-b6/D or a different inversion depending on the musical context (I also experimented with an Ab Δ7/D ) (same notes)
)BOB






)BOB
				
				
				
				
					
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