"Decane, undecane, and dodecane were detected in a Martian sample" from the paper at PNAS: <a href="https://www.pnas.org/doi/abs/10.1073/pnas.2420580122" rel="nofollow">https://www.pnas.org/doi/abs/10.1073/pnas.2420580122</a>.<p>A NASA article: <a href="https://www.jpl.nasa.gov/news/nasas-curiosity-rover-detects-largest-organic-molecules-found-on-mars/" rel="nofollow">https://www.jpl.nasa.gov/news/nasas-curiosity-rover-detects-...</a><p>Science article: <a href="https://www.science.org/content/blog-post/alkanes-mars" rel="nofollow">https://www.science.org/content/blog-post/alkanes-mars</a>: <i>So why didn't these newly announced larger molecules show up then?<p>That's because this time the samples got a different treatment (two cycles of strong heating) before the mass spec analysis.</i>