Xerocomorubin
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| Identifiers | |
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| Properties | |
| C18H10O8 | |
| Molar mass | 354.27 g·mol−1 |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Xerocomorubin is a pigment from the fungus group, the Boletales. It is the oxidized form of isoxerocomic acid . Air oxidation is responsible its formation, and oxidizes faster to a similar pulvinic acid type pigment oxidized variant, variegatorubin. .. The long wavelength has an absorption at 497 nm, 106 nm higher than its precusor isoxerocomic acid. Synthesis experiments have shown tetra-acetylation by acetic anhydride and sulphuric acid. Although xerocomorubin and variegatorubin give off the same deep red color and could simulataneously occur in a mushroom, extracts from the deep red colored mushroom Boletus rubellus Krombh. identified only variegatorubin by t.l.c, leading to the question the natural abundance of xerocomorubin.
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