title: Different isotope compositions of C32 DPEP and C32 etioporphyrin III in oil shale:  origin of etioporphyrin III from heme?
authors.affiliation: CNRS, Department de Chimie, Universite Louis Pasteur, Strasbourg.
authors.forename: R
authors.initials: R
authors.lastname: Ocampo
authors.forename: H J
authors.initials: HJ
authors.lastname: Callot
authors.forename: P
authors.initials: P
authors.lastname: Albrecht
authors.forename: B N
authors.initials: BN
authors.lastname: Popp
authors.forename: M R
authors.initials: MR
authors.lastname: Horowitz
authors.forename: J M
authors.initials: JM
authors.lastname: Hayes
mesh_terms: D001315:Australia; D002244:Carbon / Q000032:analysis; D002247:Carbon Isotopes; D002734:Chlorophyll / Q000737:chemistry; D005044:Etioporphyrins / Q000032:analysis* / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry*; D006418:Heme / Q000737:chemistry; D010163:Paleontology; D010578:Petroleum; D011166:Porphyrins / Q000032:analysis* / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D005044:Etioporphyrins; D010578:Petroleum; D011166:Porphyrins; D002734:Chlorophyll; D006418:Heme; D002244:Carbon