{"doi":"10.1248/cpb.c20-00128","title":"Four New Pregnane-10,2-carbolactones from an <i>Epipolasis</i> sp. Marine Sponge","abstract":"Four new pregnane steroids, 3β,4β,16β-trihydroxypregna-5,17-diene-10,2-carbolactone (1), 16β-acetoxy-3β,4β-dihydroxypregna-5,17-diene-10,2-carbolactone (2), 12β-acetoxy-3β,4β,16β-trihydroxypregna-5,17-diene-10,2-carbolactone (3), and 12β,16β-diacetoxy-3β,4β-dihydroxypregna-5,17-diene-10,2-carbolactone (4) were isolated from an extract of an Epipolasis sp. marine sponge. The structures of the new compounds were determined by extensive NMR spectroscopic analysis and comparison with data from previously reported compounds.","journal":"Chemical and Pharmaceutical Bulletin","year":2020,"id":115977,"datarank":0.16479184330021646,"base_score":1.0986122886681096,"endowment":1.0986122886681096,"self_citation_contribution":0.16479184330021646,"citation_network_contribution":0.0,"self_endowment_contribution":0.16479184330021646,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":2,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9462,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":422588,"name":"Dongdong Wang","orcid":"0000-0002-7824-2507","position":1,"is_corresponding":false},{"id":422589,"name":"Heidi R. Bokesch","orcid":"0000-0003-4882-3316","position":2,"is_corresponding":false},{"id":296329,"name":"Kirk R. Gustafson","orcid":"0000-0001-6821-4943","position":3,"is_corresponding":false},{"id":296327,"name":"Unwoo Kang","orcid":"0000-0002-1258-6622","position":0,"is_corresponding":true}],"reference_count":26,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-07-18T23:13:40.596604Z","pmid":"33390521","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}