Wrigglesworth, Roger; Inglis, W. David; Livingstone, Daniel B.; Suckling, Colin J.; Wood, Hamish C. S.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1984 , # 5 p. 959 - 963

Takeda Chemical Industries, Ltd.
Patent: EP1445254 A1, 2004 ;
Location in patent: Page 17, 18 ;