piano chord
D♯
D♯1F𝄪3A♯5
A major third and a perfect fifth over the root.
Written the other way round it is E♭ — the same twelve keys on a piano, a different piece of notation.
What is true of it
D♯ is D♯, F𝄪 and A♯ — 1, 3 and 5 counted from D♯.
F𝄪 is a double sharp, and it has to be: every letter from D♯ upwards is used once, so the 3 cannot be written any other way.
On an instrument that cannot reach all 3, the 5 goes first, in that order.