We present Atacama Large Millimeter/submillimeter Array observations of CO lines and dust continuum emission of the source RCSGA 032727窶�132609, a young z = 1.7 low-metallicity starburst galaxy. The CO(3窶�2) and CO(6窶�5) lines and continuum at rest-frame 450 ﾎｼm are detected and show a resolved structure in the image plane. RCSGA 032727窶�132609 shows an enhanced star formation activity compared to local spiral galaxies with similar molecular gas densities, supporting the ongoing merger窶都tarburst phase scenario. RCSGA 032727窶�132609 also appears to be a low-density starburst galaxy similar to local blue compact dwarf galaxies, which have been suggested as local analogs to high-redshift low-metallicity starburst systems.