Root : C
Minor 3rd : D#
5th : G
Dominant 7th : A#
9th : D
Cm9/D#
Cm9/D
Cm9
The minor ninth chord consist of a minor seventh chord and a major ninth. The formula is 1, ♭3, 5, ♭7, 9. This chord has a more "bluesy" sound and fits very well with the dominant ninth.