1. X‐ray crystallography, HCRC, Discovery, Procter&Gamble Pharmaceuticals 8700 Mason‐Montgomery Road Mason Ohio 45040 USA
2. Evrogen JSC Miklukho‐Maklaya 16/10 Moscow 117997 Russia
3. Shemiakin and Ovchinnikov Institute of Bioorganic Chemistry RAS Miklukho‐Maklaya 16/10 Moscow 117997 Russia