Cycloleucomelone
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| Category | Others |
| Catalog number | BBF-01112 |
| CAS | 112209-48-0 |
| Molecular Weight | 338.27 |
| Molecular Formula | C18H10O7 |
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Description
It is produced by the strain of Boletopsis leucomelaena.
Specification
| Synonyms | Cycloleucomelon; 2,7,8-Trihydroxy-3-(4-hydroxy-phenyl)-dibenzofuran-1,4-dione |
| IUPAC Name | 2,7,8-trihydroxy-3-(4-hydroxyphenyl)dibenzo[b,d]furan-1,4-dione |
Properties
| Appearance | Brown Flake Crystal or Powder |
| Melting Point | 320 °C (dec.) |
Reference Reading
1. New natural products from the sponge-derived fungus Aspergillus niger
J Hiort, K Maksimenka, M Reichert, S Perović-Ottstadt, W H Lin, V Wray, K Steube, K Schaumann, H Weber, P Proksch, R Ebel, W E G Müller, G Bringmann J Nat Prod. 2004 Sep;67(9):1532-43. doi: 10.1021/np030551d.
Fractionation of the EtOAc extract of a static culture of Aspergillus niger isolated from the Mediterranean sponge Axinella damicornis yielded eight secondary metabolites, out of which seven compounds (2-8) proved to be new natural products, whereas one was identified as the known fungal pigment cycloleucomelone (1). The new compounds included the 3,3'-bicoumarin bicoumanigrin (2), the structurally unusual 4-benzyl-1H-pyridin-6-one derivatives aspernigrins A and B (3 and 4), and pyranonigrins A-D (5-8), the latter featuring a novel pyrano[3,2-b]pyrrole skeleton hitherto unprecedented in nature. All structures were elucidated on the basis of extensive one- and two-dimensional NMR spectroscopic studies ((1)H, (13)C, COSY, HMQC, HMBC, NOE difference spectra) and mass spectral analysis. For the two chiral molecules 4 and 5, the absolute configurations were established by quantum chemical calculations of their circular dichroism (CD) spectra. In each case, two independent methods, i.e., a molecular dynamics approach taking into consideration the molecular flexibility, and a conformational analysis followed by Boltzmann weighting of the single CD spectra calculated for the conformers thus obtained, led to identical results without the need of any empirical comparison of chiroptical data reported for reference compounds. Bicoumanigrin (2) showed moderate cytotoxicity against human cancer cell lines in vitro. In addition, aspernigrin B (4) was found to display a strong neuroprotective effect against glutamic acid.
2. 5-Lipoxygenase inhibitors isolated from the mushroom Boletopsis leucomelas (Pers.) Fayod
A Takahashi, R Kudo, G Kusano, S Nozoe Chem Pharm Bull (Tokyo). 1992 Dec;40(12):3194-6. doi: 10.1248/cpb.40.3194.
Terphenyl compounds, tentatively named Bl-I (1), Bl-II (2), Bl-III (3), Bl-IV (4) and Bl-V (5), showing 5-lipoxygenase inhibitory activity have been isolated from the mushroom Boletopsis leucomelas (Pers.) Fayod. On the basis of physico-chemical and spectral evidence, they were concluded to be a series of cycloleucomelone-leucoacetates.
3. Two novel phenylacetoxylated p-terphenyls from Thelephora ganbajun Zang
H Lin, L Ji-Kai Z Naturforsch C J Biosci. 2001 Nov-Dec;56(11-12):983-7. doi: 10.1515/znc-2001-11-1213.
Two novel phenylacetoxylated p-terphenyl derivatives, namely ganbajunin F (6'-methoxy-2'-phenylacetoxy-3', 4, 4", 5'-tetrahydroxy- p-terphenyl), and ganbajunin G (5'-methoxy-2'-phenylacetoxy-3', 4, 4", 6'-tetrahydroxy-p-terphenyl), together with a known compound cycloleucomelone were isolated from the fruiting bodies of Thelephora ganbajun Zang. Their structures were established on the basis of spectral (MS, IR, NMR, HMBC, HMQC measurement) and chemical evidence.
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Bio Calculators
* Our calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
It is commonly abbreviated as: C1V1 = C2V2
* Total Molecular Weight:
g/mol
Tip: Chemical formula is case sensitive. C22H30N4O √ c22h30n40 ╳
