6 research outputs found
A new 6,9′-cyclolignan from <i>Syringa pinnatifolia</i>
<div><p>A new lignan, 4,4′-dihydroxy-3,3′-dimethoxy-6,9′-cycloligna-7,8′-dien-9′-al, was isolated from the stem of <i>Syringa pinnatifolia</i> Hems1. var. <i>alashanensis</i> MA. et S.Q. Zhou (<i>S. pinnatifolia</i>). This is the first report on the structure elucidation of a new compound based on spectroscopic methods including UV, IR, ESI-MS, 1D NMR and 2D NMR techniques.</p></div
Structure elucidation and NMR assignments of an alkaloid from <i>Ixeris chinensis</i> Nakai
<p>A new alkaloid, 2-amino-1,6-dihydro-pyridine-5-carbaldehyde (<b>1</b>), together with four known compounds, namely 4-hydroxybenzaldehyde (<b>2</b>), 4-hydroxyacetophenone (<b>3</b>), acetophenone-4-O-<i>β</i>-d-glucoside (<b>4</b>), 2-hydroxyl-6-methoxyacetophenone-4-O-<i>β</i>-d-glucoside (<b>5</b>), were isolated from the CHCl<sub>3</sub> extract from <i>Ixeris chinensis</i> Nakai. The structures of <b>1</b> was elucidated by spectroscopic methods, including UV, IR, HR-ESI-MS and extensive 1D and 2D NMR techniques.</p
A new sesquiterpene from <i>Ixeris chinensis</i>
<div><p>The petroleum ether (PE) extract from <i>Ixeris chinensis</i> was submitted to chromatographic separation. A new sesquiterpene, namely 14-noreudesma-3-hydroxy-3-en-2,9-dione, was isolated from the PE extract. The structures of the sesquiterpene was elucidated by using spectroscopic methods, including UV, IR, HR-ESI-MS and extensive 1D and 2D NMR techniques.</p></div
Structure elucidation and NMR assignments of a new 6,9-cyclotetrahydrofuranlignan from <i>Syringa pinnatifolia</i>
<p>A new 6,9-cyclotetrahydrofuranlignan, 3,3′-dimethoxy-4,4′-dihydroxy-8β,9β,8′α-6,9-cyclotetrahydrofuranlignan, was isolated from the stem of <i>Syringa pinnatifolia</i> Hems1.var. <i>alashanensis</i> MA. et S. Q. ZHOU. Its structures were elucidated on the basis of spectroscopic methods including UV, IR, ESI-MS, 1D NMR and 2D NMR.</p
The isolation and antimicrobial activities of three monocylic sesquiterpenes from <i>Syringa pinnatifolia</i>
<div><p>We report the isolation of a new sesquiterpene, named as syripinol (<b>1</b>), and two known compounds from the volatile oil of the stems of <i>Syringa pinnatifolia</i>, for the first time. The structures of the isolated compounds were elucidated on the basis of spectroscopic methods including UV, IR, ESI-MS, 1D and 2D NMR techniques. The antibacterial activities of the compounds were also evaluated against various bacteria which showed good results.</p></div
A biflavonoid glycoside from <i>Lomatogonium carinthiacum</i> (Wulf) Reichb
<div><p>A biflavonoid glycoside with a new carbon skeleton, named carinoside A, was isolated from the <i>n</i>-BuOH crude extract of the whole plant of <i>Lomatogonium carinthiacum</i> (Wulf) Reichb. The structure of the new compound was elucidated by using spectroscopic methods, including UV, IR, HR-ESI-MS and extensive 1D and 2D NMR techniques.</p></div