Sonata #7 in Eb Major (K481) by W.A. Mozart
Edited for Flute and Piano by Robert Cavally
Originally written for Violin and Piano (Violin Sonata #33, K481)
Each of the three movements has its own distinct structure: the first movement (Allegro molto) is in sonata form (although with three clear subjects in the exposition as opposed to the standard two), the second (Adagio) is a rondo, while the finale (Allegretto) is a set of variations based on a theme.