Parietin
From Wikipedia, the free encyclopedia
| Parietin | |
|---|---|
 |
|
| IUPAC name | 1,8-dihydroxy-6-methoxy-
3-methyl-anthracene- 9,10-dione |
| Systematic name | 1,8-dihydroxy-3-methoxy-
6-methylanthraquinone |
| Other names | Physcion(e), rheochrysidin, methoxyemodin |
| Identifiers | |
| CAS number | [521-61-9] |
| PubChem | |
| SMILES | Oc1cc(OC)cc(C2=O)c1C(=O)c3c2cc(C)cc3O |
| InChI | 1/C16H12O5/c1-7-3-9-13(11(17)4-7)
16(20)14-10(15(9)19)5-8(21-2)6-12 (14)18/h3-6,17-18H,1-2H3 |
| Properties | |
| Molecular formula | C16H12O5 |
| Molar mass | 284.26348 g/mol |
| Appearance | Orange/yellow |
| Related compounds | |
| Related compounds | Emodin |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Parietin is the predominant cortical pigment of lichens in the genus Caloplaca, a secondary product of the lichen Xanthoria parietina, and a pigment found in the roots of Curled Dock (Rumex crispus). It has an orangy-yellow color and absorbs blue light.
It reacts with KOH to form a deep, reddish-magenta compound.
It has also shown anti-fungal activity against barley powdery mildew and cucumber powdery mildew, more efficiently in the latter case than treatments with fenarimol and polyoxin B.
[edit] References
- Caloplaca coralloides chemistry
- Choi, Gyung Ja; Seon-Woo Lee, Kyoung Soo Jang, Jin-Seog Kim, Kwang Yun Cho and Jin-Cheol Kim (2004 December). "Effects of chrysophanol, parietin, and nepodin of Rumex crispus on barley and cucumber powdery mildews". Crop Protection 23 (12): 1215–1221. doi:.
- Edwards, Howell G. M.; Emma M. Newton, David D. Wynn-Williams, and Steven R. Coombes (2003 March 12). "Molecular spectroscopic studies of lichen substances 1: parietin and emodin". Journal of Molecular Structure 648 (1-2): 49–59. doi:.
- Solhaug, Knut A.; Yngvar Gauslaa (1996 November). "Parietin, a photoprotective secondary product of the lichen Xanthoria parietina". Oecologia 108: 412–418. doi:.
