Prokaryotic triterpenoids

Abstract
Triterpenoids belonging to the hopane family are widely distributed in prokaryotes. Three new hopanoids have now been isolated from the purple non‐sulphur bacterium Rhodomicrobium vannielii and identified essentially by spectroscopic methods. The basic compound is the 35‐aminobacteriohopane‐32,33,34‐triol, from which the other two hopanoids are derived by introduction of a tryptophanyl or an ornithinyl moiety linked to the amino group at C‐35 via an amide linkage. This is the first report of hopanoids possessing an amino group in their side‐chain and linked to aminoacyl residues.