参考文献: [1] Patent: US2017/166584, 2017, A1. Location in patent: Paragraph 0887-0889;[2] Annales de Chimie (Cachan, France), 1955, vol. <12> 10, p. 497,531;[3] Bulletin de la Societe Chimique de France, 1954, p. 610,612;[4] Patent: WO2009/156100, 2009, A1. Location in patent: Page/Page column 156