the only chord with all flat notes.
g♭7
col : chord | root | major third | perfect fifth | minor seventh row 1 : c7 | c | e | g | b♭ row 2 : c♯7 | c♯ | e♯ (f) | g♯ | b row 3 : d♭7 | d♭ | f | a♭ | c♭ (b) row 4 : d7 | d | f♯ | a | c row 5 : d♯7 | d♯ | f (g) | a♯ | c♯ row 6 : e♭7 | e♭ | g | b♭ | d♭ row 7 : e7 | e | g♯ | b | d row 8 : f7 | f | a | c | e♭ row 9 : f♯7 | f♯ | a♯ | c♯ | e row 10 : g♭7 | g♭ | b♭ | d♭ | f♭ (e) row 11 : g7 | g | b | d | f row 12 : g♯7 | g♯ | b♯ (c) | d♯ | f♯ row 13 : a♭7 | a♭ | c | e♭ | g♭ row 14 : a7 | a | c♯ | e | g row 15 : a♯7 | a♯ | c (d) | e♯ (f) | g♯ row 16 : b♭7 | b♭ | d | f | a♭ row 17 : b7 | b | d♯ | f♯ | a
the only chord with all flat notes.
Chord Root Major Third Perfect Fifth Minor Seventh
C7 C E G B♭
C♯7 C♯ E♯ (F) G♯ B
D♭7 D♭ F A♭ C♭ (B)
D7 D F♯ A C
D♯7 D♯ F (G) A♯ C♯
E♭7 E♭ G B♭ D♭
E7 E G♯ B D
F7 F A C E♭
F♯7 F♯ A♯ C♯ E
G♭7 G♭ B♭ D♭ F♭ (E)
G7 G B D F
G♯7 G♯ B♯ (C) D♯ F♯
A♭7 A♭ C E♭ G♭
A7 A C♯ E G
A♯7 A♯ C (D) E♯ (F) G♯
B♭7 B♭ D F A♭
B7 B D♯ F♯ A
G♭7