title: Syntheses of new androstane brassinosteroids with 17beta-ester groups--butyrates, heptafluorobutyrates, and laurates.
abstract: New androstane brassinosteroids with 17beta-ester groups - butyrates, heptafluorobutyrates, and laurates (4-18) - were prepared. Brassinolide activity was evaluated using both the bean second internode bioassay and the rice lamina inclination test. Brassinosteroid 16 was found to be the most active by the bean second internode bioassay. This activity in the bean second internode bioassay corresponded with the field yield, while the RLIT bioassay does not.
authors.affiliation: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 166 10 Prague 6, Czech Republic.
authors.forename: Miroslav
authors.initials: M
authors.lastname: Sísa
authors.forename: Jaroslava
authors.initials: J
authors.lastname: Hnilicková
authors.forename: Jana
authors.initials: J
authors.lastname: Swaczynová
authors.forename: Ladislav
authors.initials: L
authors.lastname: Kohout
mesh_terms: D000731:Androstanes / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D001681:Biological Assay; D060406:Brassinosteroids; D002087:Butyrates / Q000737:chemistry*; D002777:Cholestanols / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D004951:Esterification; D005466:Fluorocarbons / Q000737:chemistry*; D007848:Laurates / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012275:Oryza / Q000187:drug effects / Q000254:growth & development; D027805:Phaseolus / Q000187:drug effects / Q000254:growth & development; D013260:Steroids, Heterocyclic / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D000731:Androstanes; D060406:Brassinosteroids; D002087:Butyrates; D002777:Cholestanols; D005466:Fluorocarbons; D007848:Laurates; D013260:Steroids, Heterocyclic; C033094:perfluorobutyric acid; C023623:brassinolide