Dark blue crystallization
C.I. Natural Blue 1/Indigo J/3H-Indol-3-one, 2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-, (2E)-/Blue No 201/Indigotin/indigo Blue/indigon/Vat Dark Blue VB/indigo powder/indigovs/[δ2,2'-Biindoline]-3,3'-dione/C.I. Pigment Blue 66/trans-indigo/D2,2'-Bipseudoindoxyl/[D2,2'-Biindoline]-3,3'-dione/δ2,2'-Bipseudoindoxyl/Indigo/AO201/(2E)-2-(3-Oxo-1,3-dihydro-2H-indol-2-ylidene)-1,2-dihydro-3H-indol-3-one
400.4±45.0 °C at 760 mmHg
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provides coniferyl ferulate(CAS#:482-89-3) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate
An indole derivative, schizocommunin, was isolated along with indigotin (indigo), indirubin, isatin, and tryptanthrin, from the liquid culture medium in which a culture of Schizophyllum commune, isolated from the bronchus of a human patient with allergic bronchopulmonary mycosis, had been grown. The structure of schizocommunin was established by spectroscopic investigation. Schizocommunin showed the strong cytotoxicity against murine lymphoma cells. The assignments of the 1H- and 13C-NMR signals of indigotin were also listed.
Isolation of a new potent cytotoxic pigment along with indigotin from the pathogenic basidiomycetous fungus Schizophyllum commune.
Hosoe T1, Nozawa K, Kawahara N, Fukushima K, Nishimura K, Miyaji M, Kawai K.
The binding characteristics of indigotin with human serum albumin (HSA) and bovine serum albumin (BSA) have been investigated by various spectroscopic techniques. Spectroscopic analysis revealed that the quenching mechanism between indigotin and HSA/BSA belonged to the static quenching. The displacement experiments suggested that indigotin primarily bound to tryptophan residues on proteins within site I. The thermodynamic parameters indicated that the binding of indigotin-HSA/BSA mainly depended on the hydrophobic interaction. The binding distance of indigotin to HSA/BSA was evaluated. The results by synchronous fluorescence, three-dimensional fluorescence, Fourier Transform Infrared spectroscopy (FT-IR) and circular dichroism (CD) spectra showed that the conformation of proteins altered in the presence of indigotin.
Binding constants; Bovine serum albumin; Fluorescence spectroscopy; Human serum albumin; Indigotin
Investigation of the interaction between indigotin and two serum albumins by spectroscopic approaches.
Cheng ZJ1, Zhao HM2, Xu QY1, Liu R1.
The roots and leaves of Isatis indigotica, named ‘Ban-Lan-Gen’ and ‘Da-Qing-Ye’, respectively, are widely used for the treatment of influenza, viral pneumonia, mumps, pharyngitis, and hepatitis. The indoxyl derivatives detected in the roots and leaves of I. indigotica have been reported to be biologically active. In the present study, a liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) method was developed to determine indican, isatin, indirubin and indigotin in the roots and leaves of I. indigotica. The method has been validated for linearity, precision and accuracy. Using multiple reaction monitoring (MRM), the limits of detection (LODs) were determined as 0.004 ng for indican, 0.01 ng for isatin, 0.01 ng for indrubin and 0.03 ng for indigotin, while the limits of quantitation (LOQs) were 0.015 ng for indican, 0.04 ng for isatin, 0.04 ng for indirubin and 0.1 ng for indigotin. Compared with previously reported methods, the current method is more rapid, selective and sensitive. This is the first report of the LC/MS/MS determination of indican, isatin, indirubin and indigotin.
Copyright (c) 2007 John Wiley & Sons, Ltd.
Determination of indican, isatin, indirubin and indigotin in Isatis indigotica by liquid chromatography/electrospray ionization tandem mass spectrometry.
Zou P1, Koh HL.
Zou P1, Koh HL.