United States Patent ( 19 ) Austel et al . ( 54 ) 2-PHENYL-IMIDAZO-PYRAZINES , USEFUL

AS CARDOTONICS,Volkhard Austel,Norbert Hauel,Joachim Heider, Warthausen Manfred Reiffen, Jacobus C. A. Wan Meel

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75 Inventors: Volkhard Austel; Norbert Hauel, both of Biberach; Joachim Heider, Warthausen; Manfred Reiffen, Biberach; Jacobus C. A. Wan Meel, Biberach; Willi Diederen, Biberach, all of Fed. Rep. of Germany Dr. Karl Thomae GmbH, Biberach an der Riss, Fed. Rep. of Germany (21) Appl. No.: 675,299 (22 Filed: Nov. 27, 1984 30 Foreign Application Priority Data Dec. 23, 1983 DE Fed. Rep. of Germany ....... 3346640

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