鲁山冬凌草丁素的结构

从河南省鲁山县产冬凌草叶中分得一个新的对映-贝壳杉烯型二萜化合物,命名为鲁山冬凌草丁素,经光谱和化学方法证明,其结构如(1)式所示。     

豫西鲁山寒武系馒头组微生物岩旋回及其演化

河南鲁山地区寒武系第三统馒头组三段上部碳酸盐岩中发育了大量微生物岩,包括3种类型核形石和2种类型凝块石,其内发现了大量钙化的蓝细菌化石Girvanella(葛万菌)和Epiphyton(附枝菌)。根据凝块石-核形石—鲕粒的演化关系,可识别出5个微生物岩旋回。凝块石总是位于微生物岩旋回的底部,形成于潮下低能环境中;核形石位于旋回的中部,形成于潮下低-高能周期性变化的环境中;鲕粒灰岩出现在旋回的顶部,发育于持续搅动的潮下高能环境中。水动力条件的逐渐增强是微生物岩类型及其旋回演化的主控因素。     

鲁山冬凌草乙素和丙素的结构研究

从河南省鲁山县产冬凌草叶中分得两个新的对映-贝壳杉烯型二萜化合物,命名为鲁山冬凌草乙素和丙素,经光谱和化学方法证明,它们的结构分别为(1)和(2)。     

鲁山冬凌草戊素的结构

从鲁山冬凌草叶中分得一个新的二萜化合物,鲁山冬凌草戊素(lushanrubesensin E),其结构经各项光谱数据确定为对映-2α,11β-二羟基-3α,6β-二乙酰氧基-16-贝壳杉烯-15-酮。     

7—乙酰基—鲁山冬凌草甲素,紫萼香菜菜甲素及其有关二萜化合物…

从无毛狭叶香茶菜（Ｉｓｏｄｏｎａｎｇｕｓｔｉｆｏｌｉｕｓｖａｒ．ｇｌａｂｒｅｓｃｅｎｓＨ．Ｗ．Ｌｉ）中分离得到４个已知二萜化合物;７－乙酰基－鲁山冬凌草甲素,鲁山冬凌草甲素,乙素和紫萼香茶菜甲素,经二维核磁共振波谱（２Ｄ－ＮＭＲ）解析表明,它们的结构分别由先前报道的５、６、７和８应修订为结构１,２,３和４。     

First Record of the Gekkonid Genus Cnemaspis Strauch, 1887 from Gunung Mulu National Park,Northern Sarawak,East Malaysia may Represent an Undescribed Species

We provide confirmed photographic evidence for the previously overlooked occurrence of the polyphyletic Asian gecko genus Cnemaspis from Gunung Mulu National Park, the world-renowned UNESCO natural heritage site in northern Sarawak, East Malaysia. This new record from Sarawak province represents a remarkable range extension for Cnemaspis cf. kendallii by 550 km to the northeast and denotes the most northern occurrence of the genus in Borneo. Our new finding makes it very likely that these gekkonid lizards also inhabit appropriate limestone karst habitats in adjacent Sabah, Brunei, and Kalimantan. Given the visible differences in the Mulu specimen compared to those from the remaining distribution range on Borneo and the Malaysian Peninsula together with the fact that numerous Cnemaspis species are restricted to small areas, it seems plausible that another undescribed, rather cryptic and possibly locally endemic Bornean species is involved. Lastly, the new record contributes to the importance of the Mulu National Park as a major conservation area in East Malaysia of international concerns.     

7－乙酰基－鲁山冬凌草甲素，紫萼香茶菜甲素及其有关二萜化合物的结构修正

从无毛狭叶香茶菜（Ｉｓｏｄｏｎａｎｇｕｓｔｉｆｏｌｉｕｓｖａｒ．ｇｌａｂｒｅｓｃｅｎｓＨ．Ｗ．Ｌｉ）中分离得到４个已知二萜化合物：７－乙酰基－鲁山冬凌草甲素，鲁山冬凌草甲素、乙素和紫萼香茶菜甲素，经二维核磁共振波谱（ＺＤ－ＮＭＲ）解析表明，它们的结构分别由先前报道的５，６，７和８应修订为结构１，２，３和４。