title: A homo-isoflavonoid and a cytotoxic saponin from Dracaena draco.
abstract: Two new compounds, dracol (= (3R)-2,3-dihydro-3,5-dihydroxy-7-methoxy-3-[(4-methoxyphenyl)methyl]-8-methyl-4H-[1]benzopyran-4-one; 1) and icodeside (= (1beta,3beta,23S,24S)-3,23-dihydroxy-1-{[2-O-(2,3,4-tri-O-acetyl-alpha-L-rhamnopyranosyl)-alpha-L-arabinopyranosyl]oxy}spirosta-5,25(27)-dien-24-yl alpha-L-arabinopyranoside; 2), were isolated from the EtOH extract of the leaves of Dracaena draco, together with 17 known constituents. The structures of 1 and 2 were elucidated by in-depth spectroscopic analysis, and those of the known compounds were identified by comparison of their NMR and MS data with those reported in the literature. Icodeside (2) showed moderate cytotoxicity against human HL-60 and A-431 cells (Table 3).
authors.affiliation: Instituto de Productos Naturales y Agrobiología-C.S.I.C., Avenida Astrofísico F. Sánchez 3, E-38206 La Laguna, Tenerife.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Hernández
authors.forename: Francisco
authors.initials: F
authors.lastname: León
authors.forename: Francisco
authors.initials: F
authors.lastname: Estévez
authors.forename: José
authors.initials: J
authors.lastname: Quintana
authors.forename: Jaime
authors.initials: J
authors.lastname: Bermejo
mesh_terms: D045744:Cell Line, Tumor; D003603:Cytotoxins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D031409:Dracaena; D006801:Humans; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D018515:Plant Leaves; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D003603:Cytotoxins; D007529:Isoflavones; D010936:Plant Extracts; D012503:Saponins