piano chord
Dm7
D1F♭3A5C♭7
Minor triad with a minor seventh. The same four notes as a major sixth chord a third above.
What is true of it
Dm7 is D, F, A and C — 1, b3, 5 and b7 counted from D.
These are also the notes of F6/D. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
On an instrument that cannot reach all 4, the 5 goes first, in that order.