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Gilman et al.
Journal of the American Chemical Society, 1945 , vol. 67, p. 1846
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Albertson; Clinton
Journal of the American Chemical Society, 1945 , vol. 67, p. 1223
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Squibb and Sons
Patent: US2342142 , 1937 ;
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Tchoubar; Letellier-Dupre
Bulletin de la Societe Chimique de France, 1947 , p. 792