(52)
(52)
Where it is first named
(51) Int. Cl.*: C07G 13/00 (52) U.S. Cl.: 204/157.41; 204/164 (58) Field of Search: 204/164, 157.41, 157.44
How it is written
- (52) 1×
(52)
Where it is first named
(51) Int. Cl.*: C07G 13/00 (52) U.S. Cl.: 204/157.41; 204/164 (58) Field of Search: 204/164, 157.41, 157.44