This chord is played start on fret 1 Minor seventh chord with added 13th (6th). Most of the time the 5th is left out (3rd note). The 13th = 6th 13th is used when the chord is a 7th chord with added 6th 6th chords are not 7th chords with added 6th.
Scale structure: R-m3-5-m7-13
Note: D F A C B
Alternative names: Dminor13, Dmin13, Dm7/13, Dm7(add13), D-7(add13), D-7/13, Dmin7/13, Dmin7(add13), Dm7/6, Dm7(add6), D-7(add6), D-7/6, Dmin7/6, Dmin7(add6)
Importance: Rarely used