海藻基根硬毛藻的化学成分研究

目的对绿藻基根硬毛藻Chaetomorpha basiretorsa进行化学成分研究,并对单体化合物进行细胞毒活性筛选。方法利用正相和反相色谱、SephadexLH20色谱以及反相HPLC等手段进行分离纯化,应用MS,IR,NMR和Xray单晶衍射等方法鉴定结构,通过MTT法对单体化合物进行细胞毒活性筛选。结果从基根硬毛藻中分离并鉴定了9个化合物,分别为N苯基2萘胺(Ⅰ),邻苯二甲酸二丁酯(Ⅱ),邻苯二甲酸二异丁酯(Ⅲ),苯乙二醇(Ⅳ),邻羟基苯甲醛(Ⅴ),二甘醇单苯甲酸酯(Ⅵ),尿嘧啶(Ⅶ),胸腺嘧啶(Ⅷ),胸腺嘧啶脱氧核苷(Ⅸ)。化合物Ⅰ对KB细胞具有一定的选择性毒性(IC₅₀,10.15μg·mL^-1);尿嘧啶(Ⅶ)对KB细胞(IC₅₀,3.79μg·mL^-1)和MCF7细胞(IC₅₀,3.24μg·mL^-1)也具有选择性毒性。结论所有化合物均为首次从本属海藻中分离得到,其中N苯基2萘胺(Ⅰ)和二甘醇单苯甲酸酯(Ⅳ)为首次从海洋生物中分离得到;N苯基2萘胺(Ⅰ)和尿嘧啶(Ⅶ)具有一定选择性细胞毒活性。

Chemical constituents from marine alga Chaetomorpha basiretorsa

OBJECTIVE: To investigate the chemical constituents of marine alga Chaetomorpha basiretorsa. METHOD: Compounds were isolated by normal phase silica gel and Sephadex LH-20 gel colum chromatography, reverse phase MPLC, reverse phase HPLC and recrystallization. Their structures were elucidated by spectroscopic methods including MS, IR, NMR, and X-ray crystalography. Cytotoxicity of the compounds were screened by using standard MTT method. RESULT: Nine compounds were isolated from C. basiretorsa and their structures were identified as N-phenyl-2-naphthalenamine( I ), dibutyl phthalate( II ), diisobutyl phthalate( III ), 1-phenyl-ethane-1, 2-diol( IV ), 2-hydrox-gamma-benzaldehyde( V ), diethyleneglycol monobenzoate( VI ), uracil( VII ), thymine( VIII ) and thymidine( IX ). CONCLUSION: All these compounds were obtained from this genus for the first time, N-phenyl-2-naphthalenamine and diethyleneglycol monobenzoate were first reported from the marine organisms. Compound I and VII showed moderate activity against KB cell(IC50 10.15 microg x mL(-1) for I and 3.79 microg x mL(-1) for VII ) and MCF-7 cell(IC50 3.24 microg x mL(-1) for VII).