Piano quartet in E flat, op. 47 Piano Quartet in E flat Op.47 Piano Quartet in E flat,Op.47 Piano quintets in E flat op.44 Piano quintet in E flat, op. 44 Piano quartet in E flat major op.47 Piano quartet in E flat major op.44 piano quartet in a major,op.26 String quartet in B flat Op.64 Piano quartet in E flat major, KV 493