The volatiles emitted by the ascomycetes Hypoxylon griseobrunneum and Hypoxylon macrocarpum (Hypoxylaceae, Xylariales) were collected by use of a closed-loop stripping apparatus (CLSA) and analysed by GC–MS. The main compound class of both species were polysubstituted benzene derivatives. Their structures could only be unambiguously determined by comparison to all isomers with different substitution patterns. The substitution pattern of the main compound from H. griseobrunneum, the new natural product 2,4,5-trimethylanisole, was explainable by a polyketide biosynthesis mechanism that was supported by a feeding experiment with (methyl-2H3)methionine.
由巨囊菌属(Hypoxylaceae,Xylariales)的灰褐灰木霉(Hypoxylon griseobrunneum)和大果灰木霉(Hypoxylon macrocarpum)释放的挥发性物质,通过闭环脱附装置(CLSA)收集,并通过GC-MS进行分析。这两种物种的主要化合物类别是多取代苯衍生物。它们的结构只能通过与具有不同取代模式的所有异构体进行比较来明确确定。从灰褐灰木霉中得到的主要化合物的取代模式,即新的天然产物2,4,5-三甲氧基苯甲醚,可以通过聚酮生物合成机制来解释,该机制得到了用(甲基-2H3)蛋氨酸进行的喂养实验的支持。