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Raghavan, Subharekha Colletti, Steven L. Ding, Fa-Xiang Shen, Hong Tata, James R. Lins, Ashley Rouse Smenton, Abigail Lee Chen, Weichun Schmidt, Darby Rye Tria, George Scott Patent: US26/293364 A, 26 Location in patent: Page/Page column 3 5 US 26293364 A
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Zalesskaya, I. M. Blakitnyi, A. N. Saenko, E. P. Fialkov, Yu. A. Yagupol'skii, L. M. Journal of Organic Chemistry USSR (English Translation), 98 , vol. 6, p. 3 - 38 Zhurnal Organicheskoi Khimii, 98 , vol. 6, # 6 p. 94 - 22