+++Thanks_Viksya_1 article from Sciencedirect

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2,2-Di-(4-tert-octylphenyl)-1-picrylhydrazyl as an alkane-soluble standard for electron paramagnetic resonance studies Original Research Article
Journal of Magnetic Resonance, Volume 50, Issue 2, November 1982, Pages 274-280
M.P Dziobak, G.D Mendenhall

DOI:

http://dx.doi.org/10.1016/0022-2364(82)90057-9

link:

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http://www.sciencedirect.com/science/article/pii/0022236482900579

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