{"id":"https://openalex.org/W2017006043","doi":"https://doi.org/10.1038/355154a0","title":"A new class of natural products revealed by 3\u03b2-alkyI steranes in petroleum","display_name":"A new class of natural products revealed by 3\u03b2-alkyI steranes in petroleum","publication_year":1992,"publication_date":"1992-01-01","ids":{"openalex":"https://openalex.org/W2017006043","doi":"https://doi.org/10.1038/355154a0","mag":"2017006043"},"language":"en","primary_location":{"id":"doi:10.1038/355154a0","doi":"https://doi.org/10.1038/355154a0","is_oa":false,"landing_page_url":"https://doi.org/10.1038/355154a0","pdf_url":null,"source":{"id":"https://openalex.org/S137773608","display_name":"Nature","issn_l":"0028-0836","issn":["0028-0836","1476-4687"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","dongbi-a","doyens","erih-plus","jufo-3","ki-jl-3","medline","norway-2","poland-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319908","host_organization_name":"Nature Portfolio","host_organization_lineage":["https://openalex.org/P4310319908","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Nature Portfolio","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Nature","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":null,"display_name":"Jeremy Dahl","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210118014","display_name":"Chevron (United States)","ror":"https://ror.org/02jfa8730","country_code":"US","type":"company","lineage":["https://openalex.org/I4210118014"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jeremy Dahl","raw_affiliation_strings":["Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","Chevron Oil Field Research Company, Richmond, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","institution_ids":["https://openalex.org/I4210118014"]},{"raw_affiliation_string":"Chevron Oil Field Research Company, Richmond, USA","institution_ids":["https://openalex.org/I4210118014"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5011527154","display_name":"J. Michael Moldowan","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210118014","display_name":"Chevron (United States)","ror":"https://ror.org/02jfa8730","country_code":"US","type":"company","lineage":["https://openalex.org/I4210118014"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"J. Michael Moldowan","raw_affiliation_strings":["Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","Chevron Oil Field Research Company, Richmond, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","institution_ids":["https://openalex.org/I4210118014"]},{"raw_affiliation_string":"Chevron Oil Field Research Company, Richmond, USA","institution_ids":["https://openalex.org/I4210118014"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053331561","display_name":"Mark A. McCaffrey","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210118014","display_name":"Chevron (United States)","ror":"https://ror.org/02jfa8730","country_code":"US","type":"company","lineage":["https://openalex.org/I4210118014"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Mark A. McCaffrey","raw_affiliation_strings":["Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","Chevron Oil Field Research Company, Richmond, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","institution_ids":["https://openalex.org/I4210118014"]},{"raw_affiliation_string":"Chevron Oil Field Research Company, Richmond, USA","institution_ids":["https://openalex.org/I4210118014"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5082053488","display_name":"Paul A. Lipton","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210118014","display_name":"Chevron (United States)","ror":"https://ror.org/02jfa8730","country_code":"US","type":"company","lineage":["https://openalex.org/I4210118014"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Paul A. Lipton","raw_affiliation_strings":["Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","Chevron Oil Field Research Company, Richmond, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Chevron Oil Field Research Company, PO Box 1627, Richmond, California, 94802-0627, USA","institution_ids":["https://openalex.org/I4210118014"]},{"raw_affiliation_string":"Chevron Oil Field Research Company, Richmond, USA","institution_ids":["https://openalex.org/I4210118014"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I4210118014"],"apc_list":{"value":12690,"currency":"USD","value_usd":12690},"apc_paid":null,"fwci":7.6252,"has_fulltext":false,"cited_by_count":54,"citation_normalized_percentile":{"value":0.98125,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"355","issue":"6356","first_page":"154","last_page":"157"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11630","display_name":"Petroleum Processing and Analysis","score":0.33469998836517334,"subfield":{"id":"https://openalex.org/subfields/1602","display_name":"Analytical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11630","display_name":"Petroleum Processing and Analysis","score":0.33469998836517334,"subfield":{"id":"https://openalex.org/subfields/1602","display_name":"Analytical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10399","display_name":"Hydrocarbon exploration and reservoir analysis","score":0.26339998841285706,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10109","display_name":"Paleontology and Stratigraphy of Fossils","score":0.24369999766349792,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/steranes","display_name":"steranes","score":0.6809999942779541},{"id":"https://openalex.org/keywords/hopanes","display_name":"hopanes","score":0.875},{"id":"https://openalex.org/keywords/petroleum-biomarkers","display_name":"petroleum biomarkers","score":0.8379999995231628},{"id":"https://openalex.org/keywords/steroid-precursors","display_name":"steroid precursors","score":0.5910000205039978},{"id":"https://openalex.org/keywords/bacterial-membrane-lipids","display_name":"bacterial membrane lipids","score":0.5789999961853027},{"id":"https://openalex.org/keywords/diagenesis","display_name":"diagenesis","score":0.5950000286102295},{"id":"https://openalex.org/keywords/mass-spectrometry-fragmentation","display_name":"mass spectral fragmentation","score":0.7400000095367432}],"concepts":[{"id":"https://openalex.org/C167195282","wikidata":"https://www.wikidata.org/wiki/Q108573225","display_name":"Hopanoids","level":4,"score":0.8324469327926636},{"id":"https://openalex.org/C2776141960","wikidata":"https://www.wikidata.org/wiki/Q418830","display_name":"Sterane","level":5,"score":0.7586891055107117},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.6830958724021912},{"id":"https://openalex.org/C2780263894","wikidata":"https://www.wikidata.org/wiki/Q335268","display_name":"Alkyl","level":2,"score":0.646155595779419},{"id":"https://openalex.org/C2776482079","wikidata":"https://www.wikidata.org/wiki/Q741844","display_name":"Homologous series","level":2,"score":0.5693715214729309},{"id":"https://openalex.org/C2781327020","wikidata":"https://www.wikidata.org/wiki/Q41581","display_name":"Alkane","level":3,"score":0.5214885473251343},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.48864632844924927},{"id":"https://openalex.org/C164361826","wikidata":"https://www.wikidata.org/wiki/Q177604","display_name":"Alkylation","level":3,"score":0.4539669454097748},{"id":"https://openalex.org/C130452526","wikidata":"https://www.wikidata.org/wiki/Q180621","display_name":"Diagenesis","level":2,"score":0.41202616691589355},{"id":"https://openalex.org/C107872376","wikidata":"https://www.wikidata.org/wiki/Q321355","display_name":"Environmental chemistry","level":1,"score":0.351215660572052},{"id":"https://openalex.org/C2777207669","wikidata":"https://www.wikidata.org/wiki/Q43648","display_name":"Hydrocarbon","level":2,"score":0.28804564476013184},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.20629456639289856},{"id":"https://openalex.org/C199289684","wikidata":"https://www.wikidata.org/wiki/Q83353","display_name":"Mineralogy","level":1,"score":0.17957353591918945},{"id":"https://openalex.org/C126559015","wikidata":"https://www.wikidata.org/wiki/Q1988844","display_name":"Source rock","level":3,"score":0.07527127861976624},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C109007969","wikidata":"https://www.wikidata.org/wiki/Q749565","display_name":"Structural basin","level":2,"score":0.0},{"id":"https://openalex.org/C161790260","wikidata":"https://www.wikidata.org/wiki/Q82264","display_name":"Catalysis","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1038/355154a0","doi":"https://doi.org/10.1038/355154a0","is_oa":false,"landing_page_url":"https://doi.org/10.1038/355154a0","pdf_url":null,"source":{"id":"https://openalex.org/S137773608","display_name":"Nature","issn_l":"0028-0836","issn":["0028-0836","1476-4687"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","dongbi-a","doyens","erih-plus","jufo-3","ki-jl-3","medline","norway-2","poland-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319908","host_organization_name":"Nature Portfolio","host_organization_lineage":["https://openalex.org/P4310319908","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Nature Portfolio","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Nature","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":21,"referenced_works":["https://openalex.org/W277821489","https://openalex.org/W657414759","https://openalex.org/W1530289586","https://openalex.org/W1542566347","https://openalex.org/W1590342625","https://openalex.org/W1983765088","https://openalex.org/W1984564975","https://openalex.org/W2005353275","https://openalex.org/W2028017027","https://openalex.org/W2030644229","https://openalex.org/W2033352947","https://openalex.org/W2035176528","https://openalex.org/W2052794190","https://openalex.org/W2065516237","https://openalex.org/W2069207559","https://openalex.org/W2078439174","https://openalex.org/W2086518336","https://openalex.org/W2104071891","https://openalex.org/W2105325777","https://openalex.org/W2167089460","https://openalex.org/W2317815302"],"related_works":["https://openalex.org/W2006701370","https://openalex.org/W1985387996","https://openalex.org/W2976119607","https://openalex.org/W2030644229","https://openalex.org/W2023153459","https://openalex.org/W2951955954","https://openalex.org/W7098070470","https://openalex.org/W2241274325","https://openalex.org/W2003659031","https://openalex.org/W2041719370"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":4},{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":3},{"year":2020,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":2}],"updated_date":"2026-11-03T10:50:19.383937","created_date":"2016-06-24T00:00:00"}