作者:Hedda Schrey、Freya Janina Müller、Philipp Harz、Zeljka Rupcic、Marc Stadler、Peter Spiteller
DOI:10.1016/j.phytochem.2019.01.008
日期:2019.4
undescribed natural products, the anthranilic acid derivatives laccanthrilic acids A, B, and C, as well as the known (3S)-1,2,3,4-tetrahydro-3-β-carboline-3-carboxylic acid were isolated from fruiting bodies of Laccaria laccata. The structures were established by 1D and 2D NMR spectroscopy, HR-(+)-ESIMS and chemical synthesis. The absolute configuration of laccanthrilic acids A and B was determined by GC-MS
三种未描述的天然产物,邻氨基苯甲酸衍生物 laccanthrilic 酸 A、B 和 C,以及已知的 (3S)-1,2,3,4-四氢-3-β-咔啉-3-羧酸从Laccaria laccata的子实体。结构由一维和二维核磁共振光谱、HR-(+)-ESIMS 和化学合成确定。用甲醇和 Mosher 试剂对所得谷氨酸进行水解裂解和衍生化,然后与已知绝对构型的真实合成样品进行比较后,通过 GC-MS 确定乳菊酯酸 A 和 B 的绝对构型。laccanthrilic acid C 的绝对构型是通过比较 laccanthrilic acid B 和 C 的 CD 光谱来确定的。相关物种的代谢分析表明,这些化合物在 Laccaria 属中很常见。Laccanthrilic acid B 对秀丽隐杆线虫表现出温和的杀线虫作用,这可能在一定程度上解释了这些真菌对其寄主植物的生长和存活的有益作用。