Помогите, пожалуйста, со статьёй:
"Organocatalytic asymmetric synthesis of quinine and quinidine"
Shaheen M. Sarkar, Yuko Taira, Ayako Nakano, Keisuske Takahashi, Jun Ishihara, Susumi Hatakeyama
Tetrahedron Letters, Volume 52, Issue 8, 23 February 2011, Pages 923-927
- DOI:
http://dx.doi.org/10.1016/j.tetlet.2010.12.066
Заранее благодарю!