2-tert-Butyl-4-chloro-5-[4-(2-fluoro-eth-oxy)benz-yloxy]pyridazin-3(2H)-one.
In the title compound, C(17)H(20)ClFN(2)O(3), the dihedral angle between the pyridazine and benzene rings is 41.37 (10)°. In the crystal, there are no significant intermolecular interactions present. The terminal -CH(2)F group is disordered over two sets of sites with an occupancy ratio of 0.737 (2):0.263 (2).
Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, 19 Xinjiekou Outer St, Beijing 100875,  People's Republic of China.
Huihui
H
Jing
Tiantian
T
Mou
Xianzhong
X
Zhang