The minor seventh chord consists of four notes taken from the major scale of the same letter name. These notes are the first (1), flattened third (b3), fifth (5) and flattened seventh (b7) notes of the major scale, so the chord formula for the minor seventh chord is :
Notice that the minor seventh chord is simply a minor chord with the flattened seventh note added. The Cm7 arpeggio with inversions is shown here.
Here is a bass line that makes use of the Cm7 arpeggio.