NeoquassineCAS# 76-77-7 |
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Cas No. | 76-77-7 | SDF | Download SDF |
PubChem ID | 72964 | Appearance | White powder |
Formula | C22H30O6 | M.Wt | 390.5 |
Type of Compound | Diterpenoids | Storage | Desiccate at -20°C |
Synonyms | Nigakihemiacetal B; Simalikahemiacetal A | ||
Solubility | Soluble in methan | ||
SMILES | CC1C=C(C(=O)C2(C1CC3C4(C2C(=O)C(=C(C4CC(O3)O)C)OC)C)C)OC | ||
Standard InChIKey | BDQNCUODBJZKIY-NUPPOKJBSA-N | ||
Standard InChI | InChI=1S/C22H30O6/c1-10-7-14(26-5)20(25)22(4)12(10)8-15-21(3)13(9-16(23)28-15)11(2)18(27-6)17(24)19(21)22/h7,10,12-13,15-16,19,23H,8-9H2,1-6H3/t10-,12+,13+,15-,16?,19+,21-,22+/m1/s1 | ||
General tips | For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months. We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months. Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it. |
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About Packaging | 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial. 2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial. 3. Try to avoid loss or contamination during the experiment. |
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Shipping Condition | Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request. |
Description | 1. Quassin, neoquassin and picrasinoside B are insecticide quassinoids. |
Neoquassine Dilution Calculator
Neoquassine Molarity Calculator
1 mg | 5 mg | 10 mg | 20 mg | 25 mg | |
1 mM | 2.5608 mL | 12.8041 mL | 25.6082 mL | 51.2164 mL | 64.0205 mL |
5 mM | 0.5122 mL | 2.5608 mL | 5.1216 mL | 10.2433 mL | 12.8041 mL |
10 mM | 0.2561 mL | 1.2804 mL | 2.5608 mL | 5.1216 mL | 6.402 mL |
50 mM | 0.0512 mL | 0.2561 mL | 0.5122 mL | 1.0243 mL | 1.2804 mL |
100 mM | 0.0256 mL | 0.128 mL | 0.2561 mL | 0.5122 mL | 0.6402 mL |
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations. |
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Liquid chromatography electrospray ionization tandem mass spectrometric determination of quassin and neoquassin in fruits and vegetables.[Pubmed:20196620]
J Agric Food Chem. 2010 Mar 10;58(5):2807-11.
Quassia amara wood chips are used by organic farmers as a valid alternative to synthetic insecticides. The powder of Q. amara contains high levels of quassin, neoquassin and picrasinoside B. In this study we developed a liquid chromatography mass spectrometry method for the rapid and accurate quantification of the insecticide quassinoids on fruits and vegetables. Quassinoids were extracted from fruits and vegetables with acetonitrile and separated on a Zorbax Column Eclipse XDB C8 by isocratic elution with a mobile phase consisting of water and methanol with 0.1% of formic acid. Using a high-performance liquid chromatograph coupled with an electrospray ionization tandem mass spectrometer (HPLC/ESI-MS/MS), quassinoids were selectively and simultaneously detected monitoring the multiple reaction (MRM) transitions of proton adduct precursor ions: m/z 389.5 --> 222.9 for quassin, 391.5 --> 372.9 for neoquassin and 576.1 --> 394.5 for picrasinoside B. For all quassinoids calibration was linear over a working range of 1 and 100 microg/kg with r > 0.991. Limit of determination (LOD) and limit of quantification (LOQ) for both quassinoids were 0.5 and 1 microg/kg respectively while for picrasinoside B they were 5 and 10 microg/kg. Quassinoid recoveries ranged from 85.3% to 105.3% with coefficients of variation between 2.5% and 12.8% for fruit and vegetables. The presence of interfering compounds in the fruit and vegetable extract was evaluated and found to be minimal. Due to the linear behavior it was concluded that the multiple reaction transitions of precursor ions can be used for analytical purposes, i.e. for identification and quantification of quassin, neoquassin, and picrasinoside B in fruit and vegetable extracts at trace levels.