The next chord progression contains a new chord, D6.
D6
Strum only five strings. The chord shape given uses the second and third fingers. You could use your first and second fingers as an alternative fingering.
Another commonly used sixth chord shape is G6.
G6
The G6 chord shape is like a G chord with the third finger lifted off.
Another common key for guitar is the key of E minor (Em). El Condor Pasa is in the key of E minor and uses notes from the E minor scale. The key signature for E minor is the same as G major, that is it contains one sharp, F sharp (F#). It is common for songs in the key of E minor to contain a D sharp (D#) in the melody.