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This chord is a built from a standard minor triad 1-b3-5 plus a natural 7 (the note a semitone below the root).
It is often used as an alternative to a normal minor chord, especially by soloists.
Standard scale choice
Use the minor-major scale, known in classical music as the 'ascending melodic minor': 1 2 b3 4 5 6 7
(It might be easiest to think of this as a standard major scale, just with a flattened third.)
You might notice that the harmonic minor scale can sound good here too: 1 2 b3 4 5 b6 7
If you take the b3, 5 and 7 degrees of the scale, you get an augmented triad -- a 'symmetrical' triad where each note is a major third from its neighbours. Playing licks based on these three notes will produce some cool sounds.
Also, you can think of any melodic minor scale as the result of combining a minor arpeggio built on the root, and a dominant 9 arpeggio built on the fifth. Alternating lines from each of these arpeggios sounds hip.