A heptacyclic polyprenoid hydrocarbon in sediments: a clue to unprecedented biological lipidsElectronic supplementary information (ESI) available: 13C and 1H NMR data for hydrocarbon 1. See http://www.rsc.org/suppdata/cc/b0/b001804j/
Abstract
A novel heptacyclic C37 alkane presenting a regular polyprenoid structure has been isolated from a biodegraded bituminous rock and identified by NMR; this hydrocarbon is the most highly cyclized polyprenoid alkane ever completely identified; the absence of specific methyl groups give clues to unprecedented biological precursor lipids resulting from the extensive cyclization of regular octaprenoids.