| 摘要 |
Compounds of the general formula <IMAGE> and their salts (n = 0-4 R = alkyl optionally substituted by one or more halogen atom(s), halogen, nitro, dialkylamino, carboxamido or alkanoylamino) are prepared by reacting a compound of the general formula <IMAGE> with ethylene diamine (R<8> alkyl, aralkyl or aryl, R<9> = alkyl, X = halogen) optionally followed by salt formation. |
