title: Perhydro-beta-Carotene in the Green River Shale.
abstract: Several triterpenes and the tetraterpene perhydro-beta-carotene have been identified in the branched-cyclic hydrocarbon fraction of this Eocene shale. The analytical procedure included thiourea adduction followed by combined gas chromatography and mass spectrometry.
authors.forename: S M
authors.initials: SM
authors.lastname: Murphy
authors.forename: A
authors.initials: A
authors.lastname: McCormick
authors.forename: G
authors.initials: G
authors.lastname: Eglinton