Abstract
The Front Cover shows a new class of bloody-red sulfur compounds, so called tetrathiaporphyrines, which could be isolated from some wild onions (genus Allium L.). These plants are known as drumstick onions and belong to the subgenus Melanocrommyum. This pigment is formed enzymatically if plant tissue is injured. Now, the colour-giving tetrathiaporphyrine, representing a new class of chemical pigments, could be fully synthesized, using 2-thiocyanato-1H-pyrrole as starting block. The final structure of the pigment was confirmed by X-ray crystallography of the reddish, flat crystals. More information can be found in the Research Article by M. Keusgen et al.
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