Fig. 5.

Molecular subclusters and structural annotations. Gray lines indicate single fragmentation, while colored lines indicate multiple fragmentations. A) N-acyl tryptamine subcluster was built around N-acetyl tryptamine and N-pentanoyl tryptamine nodes, which allowed the annotation of other two congeners. B) Typical fragmentations of norharmane detected in WUR7 extract. C) In the serotonin subcluster, two β-carbolines were putatively identified as shepherdine and a shepherdine novel homolog with a longer side chain.