title: Additional minor ecdysteroid components of Leuzea carthamoides.
abstract: Seventeen additional minor ecdysteroid compounds were isolated and identified from the roots of Leuzea carthamoides (Wild.) DC. Eight of them are new phytoecdysteroids: carthamoleusterone (13) is a new side-chain cyclo-ether with five-membered ring; 14-epi-ponasterone A 22-glucoside (12) is a rare and unusual natural 14 beta-OH epimer; 15-hydroxyponasterone A (11) is also new and rare with its C-15 substituted position, as well as 22-deoxy-28-hydroxymakisterone C (18) possessing secondary hydroxyl in position C-28 and 26-hydroxymakisterone C (20) with hydroxy groups in positions 25 and 26. New are also 1 beta-hydroxymakisterone C (21) and 20,22-acetonides of inokosterone (8) and integristerone A (10). Series of already known ecdysteroids: ecdysone (1), 20-hydroxyecdysone 2- and 3-acetates (3 and 4), turkesterone (6), inokosterone (7), 24-epi-makisterone A (14), and amarasterone A (22) are reported here as new constituents of L. carthamoides. Seven earlier reported Leuzea ecdysteroids: 20-hydroxyecdysone (2), ajugasterone C (5), integristerone A (9), 24(28)-dehydromakisterone A (15), 24(28)-dehydroamarasterone B (16), (24Z)-29-hydroxy-24(28)-dehydromakisterone C (17) and makisterone C (19) are also included because they are now better characterized.
authors.affiliation: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo n. 2, 166 10 Prague, Czech Republic.
authors.forename: Milos
authors.initials: M
authors.lastname: Budesínský
authors.forename: Karel
authors.initials: K
authors.lastname: Vokác
authors.forename: Juraj
authors.initials: J
authors.lastname: Harmatha
authors.forename: Josef
authors.initials: J
authors.lastname: Cvacka
mesh_terms: D026461:Ecdysteroids / Q000737:chemistry* / Q000302:isolation & purification; D043843:Leuzea / Q000737:chemistry* / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D026461:Ecdysteroids