InChI=1S/C34H59NO15/c1-5-6-12-20(3)32(50-29(42)18-23(34(47)48)16-27(39)40)25(49-28(41)17-22(33(45)46)15-26(37)38)14-19(2)11-9-7-8-10-13-24(36)31(44)30(43)21(4)35/h19-25,30-32,36,43-44H,5-18,35H2,1-4H3,(H,37,38)(H,39,40)(H,45,46)(H,47,48)/t19-,20+,21-,22+,23+,24?,25-,30+,31?,32+/m0/s1 |
WQXBMSIHHKRGPX-TWFRCCRHSA-N |
CCCC[C@H]([C@H]([C@H](C[C@H](CCCCCCC(C([C@@H]([C@H](C)N)O)O)O)C)OC(C[C@@H](CC(=O)O)C(=O)O)=O)OC(=O)C[C@@H](CC(O)=O)C(=O)O)C |
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Aspergillus niger
(NCBI:txid5061)
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See:
PubMed
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Bronsted base
A molecular entity capable of accepting a hydron from a donor (Bronsted acid).
(via organic amino compound )
Bronsted acid
A molecular entity capable of donating a hydron to an acceptor (Bronsted base).
(via oxoacid )
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Aspergillus metabolite
Any fungal metabolite produced during a metabolic reaction in the mould, Aspergillus .
mycotoxin
Poisonous substance produced by fungi.
(via fumonisin )
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View more via ChEBI Ontology
(2R,2'R)-2,2'-{[(5R,6R,7S,9S,18R,19S)-19-amino-16,17,18-trihydroxy-5,9-dimethylicosane-6,7-diyl]bis[oxy(2-oxoethane-2,1-diyl)]}dibutanedioic acid
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Nielsen KF, Ngemela AF, Jensen LB, de Medeiros LS, Rasmussen PH (2015) UHPLC-MS/MS determination of ochratoxin A and fumonisins in coffee using QuEChERS extraction combined with mixed-mode SPE purification. Journal of agricultural and food chemistry 63, 1029-1034 [PubMed:25553918] [show Abstract] A method was developed for simultaneous determination of the mycotoxins: ochratoxin A (OTA) and fumonisins B2 (FB2), B4 (FB4), and B6 (FB6) in green, roasted, and instant coffee. Extraction was performed by QuEChERS (quick, easy, cheap, effective, rugged, and safe) under acidic conditions followed by mixed-mode reversed phase-anion exchange solid phase extraction. OTA and FB2 were detected at levels down to 0.5 and 2 μg/kg by UHPLC-MS/MS and quantitated via isotope dilution using U-(13)C-labeled FB2 and OTA as internal standards. Mixing 20% isopropanol in the acetonitrile of the acidic UHPLC gradient system increased the signal intensity by 50% and decreased the ion-suppression with 50-75% in roasted coffee samples. About half of the roasted coffee samples (n = 57, from 9 countries) contained detectable levels of OTA, however, with only 5 samples above the EU regulatory limit of 5 μg/kg and the highest with 21 μg/kg. None of the 25 instant coffee samples contained OTA above the EU regulatory level of 10 μg/kg. Nonetheless, the toxin could be detected in 56% of the analyzed instant coffee samples. Fumonisins were not detected in any of the roasted or instant coffee samples (n = 82). However, in the green coffee samples (n = 18) almost half of the samples were positive with a maximum value of 164 μg/kg (sum of FB2, FB4, and FB6). This discrepancy between green coffee and processed coffees indicated that the fumonisins decompose during the roasting process, which was confirmed in roasting experiments. Here fumonisins could not be detected after roasting of the green, 164 μg/kg coffee, sample. Under the same conditions, OTA was reduced from 2.4 to 0.5 μg/kg. | Månsson M, Klejnstrup ML, Phipps RK, Nielsen KF, Frisvad JC, Gotfredsen CH, Larsen TO (2010) Isolation and NMR characterization of fumonisin B2 and a new fumonisin B6 from Aspergillus niger. Journal of agricultural and food chemistry 58, 949-953 [PubMed:20028011] [show Abstract] A new fumonisin, fumonisin B(6) (1), has been isolated by cation-exchange and reverse-phase chromatography, together with fumonisin B(2) (2), from stationary cultures of the fungus Aspergillus niger NRRL 326. Analysis of mass spectrometric and NMR data determined that FB(6) is a positional isomer of FB(1) and iso-FB(1), having hydroxyl functions at C3, C4, and C5. Analysis of the NMR data for FB(2) showed very similar chemical shift values when compared to an authentic Fusarium FB(2) standard, strongly indicating identical molecules despite that an absolute stereochemical assignment of FB(2) from A. niger was not possible. |
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