US2013/17497 A1, ;

Paragraph 0045 ;

Chuang, Ta-Hsien; Hsieh, Hsing-Hung; Chen, Chang-Ken; Wu, Chung-Chih; Lin, Chao-Chen; Chou, Pi-Tai; Chao, Ting-Han; Chow, Tahsin J. Organic Letters, 2008 ,  vol. 10,  # 13  p. 2869 - 2872