piano chord
B♭m
B♭1D♭♭3F5
The major triad with its third lowered by a half step.
Written the other way round it is A♯m — the same twelve keys on a piano, a different piece of notation.
What is true of it
B♭m is B♭, D♭ and F — 1, b3 and 5 counted from B♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.