Optimization of 3', 4'-Anhydrovinblastine Synthesis in vitro Using Crude Extracts of Catharanthus roseus Irradiated with Near- Ultraviolet Light [0.03%]
辐照粗提取物法优化体外合成3',4'-去氧长春新碱的研究
Mamiko Asano,Kazuo Harada,Akiko Umeno et al.
Mamiko Asano et al.
Dimeric indole alkaloids (DIAs), such as vinblastine and vincristine, found in Catharanthus roseus are used clinically as antitumor drugs. A stable supply of DIAs is desired because these alkaloids are very expensive due to their low abunda...
Six New Triterpenoids from the Aerial Parts of Maytenus diversifolia [0.03%]
毛叶南美杠柳 aerial parts中新三萜类成分的研究
Narumi Anoda,Mayumi Matsunaga,Miwa Kubo et al.
Narumi Anoda et al.
Five new ursane-type triterpenoids 1-5, and one new oleanane-type triterpenoids 7 were isolated from the MeOH extract of the aerial parts of Maytenus diversifolia. Their structures were elucidated by analyzing spectroscopic data and chemica...
Three Tetracyclic Triterpenoic Acids from Dysoxylum densiflorum and Their Antibacterial Activities [0.03%]
三种来自Dysoxylum densiflorum的四环三萜酸及其抗菌活性
Ni Komang T Dharmayanil,Lia D Juliawaty,Yana M Syaha
Ni Komang T Dharmayanil
This paper reports the chemical isolation and antibacterial properties of terpenoid components of Dysoxylum densiflorum. Three new tetracyclic triterpenoic acids, densiflorinic acids A-C (1-3), were isolated from the acetone extract of the ...
A Novel 3,4-Secocycloartane Triterpene, Bearing a Tetrahydropyran Moiety, from Pasaniaformosana Leaf [0.03%]
来自台湾赤楠叶中四氢吡喃取代的3，4-紫丁香烷型三萜新化合物
Shoei-Sheng Lee,Yue Xi,Chien-Kuang Chen et al.
Shoei-Sheng Lee et al.
Bioassay guided fractionation against a-glucosidase and separation of the ethanolic extract of Pasania formosana leaf by chromatographic methods led to the isolation of a novel secocycloartane triterpene. This compound, named pasasecocycloa...
16-Hydroxycembra-1,3,7,11-tetraene, a new Cembrane Diterpene from Malaysian Soft Coral Genus Sarcophyton [0.03%]
来自马来西亚海绵属珊瑚的新的海松二萜烯化合物16-羟基-1，3，7，11-海松四烯
Takashi Kamada,Chin-Soon Phan,Hoe-Seng Tin et al.
Takashi Kamada et al.
One new cembrane diterpene, 16-hydroxycembra-1,3,7,11-tetraene (1), along with three known compounds, 15-hydroxycembra-1,3,7,11-tetraene (2), sarcophine (3) and sarcophytoxide (4) were isolated from Sarcophyton sp. collected from Karah Isla...
Alfarius Eko-Nugroho,Wongi Chin-Piow,Yusuke Hirasawa et al.
Alfarius Eko-Nugroho et al.
Three new daphnane diterpenoids, altadaphnans A-C (1 - 3), have been isolated from the aerial parts of Ddphne altaica, together with 7 known daphnane diterpenoids. Their structures were elucidated on the basis of lD and 2D NMR data. Altadap...
A New Seco-Clerodane-Type Diterpenoid from Bornean Liverwort Schistochila acuminata [0.03%]
产于加里曼丹的尖叶兰属地钱Schistochila acuminata的新倍半萜分离鉴定
Shean-Yeaw Ng,Takashi Kamada,Monica Suleiman et al.
Shean-Yeaw Ng et al.
A new compound, schistochilic acid D (1) and two known compounds (2 and 3) were isolated from MeOH extract of Bornean liverwort. Schistochila acuininata collected from Mount Trus Madi, Sabah. The structure of the new metabolite was establis...
Cyclization into Hydrindanes Using Samarium Diiodide: Stereochemical Features Depending on the Protecting Group [0.03%]
双碘化钐催化环化反应合成六氢茚满类化合物的立体选择性研究——保护基的影响
Masakazu Sono,Yukiko Nishibuchi,Norihito Yamaguchi et al.
Masakazu Sono et al.
Monocyclic compounds bearing ketone and enone moieties in the same molecule can be cyclized to bicyclic compounds initiated by samarium diiodide. The stereochemistry of the products depended on the reaction conditions and also the protectin...
Capgermacrene C, a New Sesquiterpenoid from a Bornean Soft Coral, Capnella sp [0.03%]
产自加里曼丹海鞘的天然产物-capnigermacrene C
Takahiro Ishii,Chin-Soon Phan,Takashi Kamada et al.
Takahiro Ishii et al.
A new bicyclogermacrene, capgermacrene C (1), along with a known compound, 1,4-peroxy-5-muurolene (2), were isolated from a population of Bornean soft coral Capnella sp. The structures of these metabolites were determined by extensive spect...
A Puna Collection of Senecio punae, Main Source of a Versatile Eremophilane-type Ketone [0.03%]
Senecio punae中 versatile的eremophilane型 ketone化合物的来源研究
Ana Maria Rodriguez,Susana Montanaro,Alicia Bardon et al.
Ana Maria Rodriguez et al.
Senecio punae Cabrera (Asteraceae-Senecioneae) is an endemic species from Puna semi-desert region of Argentina.The major compound, 4p,5p-eremophil- 7(11)9-dien-8-one, also known as dehydrofukinone (D), was isolated from the diethyl ether ex...