A new sesquiterpene-substituted benzoic acid has been isolated from the brown Alga Dictyopteris divaricata Okam.. Its structure was elucidated as 3-[(2-hydroxy-2,5,5,8a-tetra- methyldecahydro-1-naphthalenyl)methyl]-4...A new sesquiterpene-substituted benzoic acid has been isolated from the brown Alga Dictyopteris divaricata Okam.. Its structure was elucidated as 3-[(2-hydroxy-2,5,5,8a-tetra- methyldecahydro-1-naphthalenyl)methyl]-4-hydroxybenzoic acid, named dictyvaric acid on the basis of spectroscopic methods including IR, HRFABMS, 1D and 2D NMR techniques.展开更多
Sri Lankan President Premodasa was killed by a suicide bomber in a massive blast at a May Day rally. On May 7, Prime Minister Dingiri Banda Wijetunge was elected Sri Lanka’s new executive president by the Parliament.
Zhao Ziyang, Generai Secretary of the Chinese Communist Party, made a televised speech through satellite on February 2 at the 1988 meeting of the World Economic Forum held in Davos, Switzerland. The Palestinian Libera...Zhao Ziyang, Generai Secretary of the Chinese Communist Party, made a televised speech through satellite on February 2 at the 1988 meeting of the World Economic Forum held in Davos, Switzerland. The Palestinian Liberation Organization on February 2 in Tunis denounced the US veto of a UN Security Council展开更多
基金supported by national 863 project(Grant No.2004AA625030,2001AA620503)NNSFC(Grant No.20432030)Key Innovative Project of the Academy(Grant No.KZCX3-SW-215).
文摘A new sesquiterpene-substituted benzoic acid has been isolated from the brown Alga Dictyopteris divaricata Okam.. Its structure was elucidated as 3-[(2-hydroxy-2,5,5,8a-tetra- methyldecahydro-1-naphthalenyl)methyl]-4-hydroxybenzoic acid, named dictyvaric acid on the basis of spectroscopic methods including IR, HRFABMS, 1D and 2D NMR techniques.
基金Supported by the Science Foundation of China University of PetroleumBeijing(2462015YQ0604)partially by the Personnel Training and Academic Development Fund(2462015QZDX02)
文摘Sri Lankan President Premodasa was killed by a suicide bomber in a massive blast at a May Day rally. On May 7, Prime Minister Dingiri Banda Wijetunge was elected Sri Lanka’s new executive president by the Parliament.
文摘Zhao Ziyang, Generai Secretary of the Chinese Communist Party, made a televised speech through satellite on February 2 at the 1988 meeting of the World Economic Forum held in Davos, Switzerland. The Palestinian Liberation Organization on February 2 in Tunis denounced the US veto of a UN Security Council
