Robuta

https://webbook.nist.gov/cgi/cbook.cgi?ID=R244409 hopane https://journals.uu.se/AGC/article/view/755 Hopanoid distributions differ in mineral soils and peat: a re-evaluation of hopane-based pH proxies... https://journals.uu.se/AGC/article/view/755/850 Hopanoid distributions differ in mineral soils and peat: a re-evaluation of hopane-based pH proxies... https://webbook.nist.gov/cgi/inchi?ID=R56268&Mask=2000 C30 17B,21A-Hopane (Moretane)