Guitar chords in the key of C major:
Chord C7-9 (8th fret) notes: C, Bb, E, G and Db. You should not play the 5th string.
This chord is played by placing a barre on fret eight with your index finger.
C7-9 (C dominant 7th flat 9th) guitar chord's alternative names: C7b9, Cdom7b9, Cdom7-9.
1(C), 3(E), 5(G), b7(A#/Bb), b9(C#/Db).