| 摘要 |
Novel compounds of the formula <IMAGE> I wherein A is selected from the group consisting of nitrogen and =CH-, G is selected from the group consisting of -0-, <IMAGE> Z is selected from the group consisting of hydrogen and alkyl of 1 to 5 carbon atoms or taken with Y forms a carbon-nitrogen or carbon-carbon bond, Z' is selected from the group consisting of hydrogen and halogen, Y is hydrogen, or taken with Z is a carbon-nitrogen or carbon-carbon bond or taken with X is =0 and X is hydrogen or taken with Y is =0, R is selected from the group consisting of hydroxymethyl, formyl, tetrazol-5-yl, N-(tetrazol-5-yl) carbamoyl, aminomethyl and carbamoyl, R1 is selected from the group consisting of hydrogen, halogen and alkoxy of 1 to 5 carbon atoms and its non-toxic, pharmaceutically acceptable acid addition salts having anti-allergic activity and their preparation.
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