title: Dictyodendrins A-E, the first telomerase-inhibitory marine natural products from the sponge Dictyodendrilla verongiformis.
abstract: Five new alkaloids, dictyodendrins A-E (1-5), were isolated from the Japanese marine sponge Dictyodendrilla verongiformis as telomerase inhibitors. Their structures were elucidated by spectroscopic and chemical methods. Dictyodendrins are tyramine-based pyrrolocarbazole derivatives containing three or four p-hydroxybenzene groups. They inhibited telomerase completely at a concentration of 50 microg/mL.
authors.affiliation: Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.
authors.forename: Kaoru
authors.initials: K
authors.lastname: Warabi
authors.forename: Shigeki
authors.initials: S
authors.lastname: Matsunaga
authors.forename: Rob W M
authors.initials: RW
authors.lastname: van Soest
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Fusetani
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000818:Animals; D002227:Carbazoles / Q000737:chemistry; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006868:Hydrolysis; D007564:Japan; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D011161:Porifera / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry; D013237:Stereoisomerism; D019098:Telomerase / Q000037:antagonists & inhibitors*; D014439:Tyramine / Q000737:chemistry
chemical_list: D000470:Alkaloids; D002227:Carbazoles; D004791:Enzyme Inhibitors; D011758:Pyrroles; D019098:Telomerase; D014439:Tyramine