title: Three new jatrophane-type diterpenes from Euphorbia pubescens.
abstract: Three new macrocyclic jatrophane diterpene polyesters, named pubescenes A ( 1), B ( 2), and C ( 3), and the known compounds indole-3-aldehyde and scopoletin have been isolated and characterised from the whole dried plant of Euphorbia pubescens. The structures of the new compounds were established by spectroscopic means including 2D-NMR techniques such as COSY, HMQC, HMBC and NOESY experiments. Compounds 1 - 3 were evaluated for their in vitro effect on the growth of three human cancer cell lines MCF-7 (breast), NCI-H460 (lung) and SF-268 (CNS) as well as for their capacity to interfere with the proliferation of human peripheral blood lymphocytes. They exhibited a moderate growth inhibitory effect on the cancer cell line NCI-H460. No effect was observed on the mitogenic response of human lymphocytes to PHA.
authors.affiliation: Centro de Estudos de Ciências Farmacêuticas, Faculdade de Farmácia da Universidade de Lisboa, Lisboa, Portugal.
authors.forename: Cláudia
authors.initials: C
authors.lastname: Valente
authors.forename: Maria José
authors.initials: MJ
authors.lastname: Ferreira
authors.forename: Pedro M
authors.initials: PM
authors.lastname: Abreu
authors.forename: Madalena
authors.initials: M
authors.lastname: Pedro
authors.forename: Fátima
authors.initials: F
authors.lastname: Cerqueira
authors.forename: Maria São José
authors.initials: MS
authors.lastname: Nascimento
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000494:pharmacology*; D004224:Diterpenes / Q000008:administration & dosage / Q000494:pharmacology*; D028481:Euphorbia; D006801:Humans; D008214:Lymphocytes / Q000187:drug effects; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology*; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: D000970:Antineoplastic Agents; D004224:Diterpenes; D010936:Plant Extracts; C468576:jatrophene diterpene