A new gymnomitrane-type sesquiterpenoid from the liverwort Cylindrocolea recurvifolia

A novel gymnomitrane-type alcohol was identified from the liverwort Cylindrocolea recurvifolia. The structure of this new compound was confirmed by X-ray analysis. This is the first report on the chemical constituents of this genus.     

A cyclic peroxide of clerodenoic acid from the Taiwanese liverwort Schistochila acuminata

Two minor diterpenoids, 15(16)-peroxy-3, 13-clerodadien-18-oic acid (4) and totarol (7), were isolated from the liverwort Schistochila acuminata. The former is a further oxidized cyclic peroxide from the major component. The latter is a rearranged abietane alcohol which skeleton was found in liverworts for the first time.     

Terpenoids and bisbibenzyls from Chinese liverworts Conocephalum conicum and Dumortiera hirsuta

Four new monoterpene esters, 2α,5β-dihydroxybornane-2-cinnamate (1), 2α,5β-dihydroxybornane-5-acetyl-2-cinnamate (2), 2α,5β-dihydroxybornane-2-p-hydroxycinnamate (3) and 2α,5β-dihydroxy-bornane-2-cis-p-hydroxycinnamate (4), together with a known compound 3,4-dimethoxystyrene (5) were isolated from Chinese liverwort Conocephalum conicum and six known compounds, 5,7-dihydroxycalamenene (6), 7-hydroxycalamenene (7), lunularin (8), riccardin C (9), marchantin C (10) and riccardin D (11) were isolated from Dumortiera hirsuta. Their structures were elucidated by extensive spectral analysis and chemical correlations. Compounds 1 and 8 showed moderate cytotoxicity against human HepG2 cells with IC₅₀ 4.5 μg/ml and 7.4 μg/ml, respectively, while compound 8 also showed antimicrobacterial activity against Pseudomonas aeruginosa with minimum inhibitory concentration at 64 μg/ml.     

A new gymnomitrane-type sesquiterpenoid from the liverwort Cylindrocolea recurvifolia

A novel gymnomitrane-type alcohol was identified from the liverwort Cylindrocolea recurvifolia. The structure of this new compound was confirmed by X-ray analysis. This is the first report on the chemical constituents of this genus.     

多苞裂萼苔的化学成分

目的：对多苞裂萼苔Chiloscyphus polyanthus（L.）Cord乙醇提取物的化学成分进行研究，从中寻找生物活性成分．方法：采用柱色谱方法分离化合物，通过渡谱方法确定其结构。结果：从其乙醇提取物中分离得到3个倍半萜类化合物，分别是（＋）-桉烷-3-烯-6β，7α-二醇（1）、（＋）-桉烷-4-烯-1β，3α，6β-三醇（2）和（＋）-桉烷-4（14）-烯-3α，7α，11-三醇（3），还得到尿嘧啶脱氧核苷（4）、二十五烷酸单甘油酯（5）、胡萝卜苷（6）．结论：化合物2～5均为首次从该植物中分离得到．     

指叶苔中的一个新倍半萜内酯化合物

目的：对指叶苔的化学成分进行分离和鉴定。方法：运用柱色谱方法分离纯化化合物,通过波谱数据和理化性质对其进行结构鉴定。结果：分离获得了3个化合物,分别为：5α-hydroxy-9α,10α-epoxycadinan-3-en-2β,14-olide（1）,abieslactone（2）,和24,25-dihydro-abieslactone（3）。结论：化合物1为新化合物,化合物2和3为首次从该植物中分离得到。     

A Cyclic Peroxide of Clerodenoic Acid from the Taiwanese Liverwort Schistochila acuminata

Abstract

Two minor diterpenoids, 15(16)-peroxy-3, 13-clerodadien-18-oic acid (4) and totarol (7), were isolated from the liverwort Schistochila acuminata. The former is a further oxidized cyclic peroxide from the major component. The latter is a rearranged abietane alcohol which skeleton was found in liverworts for the first time.