IMIDAZO(4,5-C)PYRIDAZINES/(4,5-D)PYRIDAZINES/(4,5-B) PYRAZINES/AND (4,5-E)-1,2,4-TRIAZINES
A Standard patent application filed on 21 December 1984 credited to Austel, Volkhard
;
Hauel, Norbert
;
Diederen, Willi
;
Reiffen, Manfred
;
Meel, Jacobus Constantinus Antonius Van
;
Heider, Joachim