摘要：

The present invention relates to novel compounds of the formula ##STR1## wherein R 1 and R 2 are the same or different and are each hydrogen, alkyl, halogen, carbomethoxy, carbethoxy, alkoxy, or alkanoyl, R 6 is hydrogen, methyl or ethyl, R 3 , R 4 and R 5 are the same or different and are each hydrogen, methyl, methoxy, ethoxy, methoxyethoxy or ethoxyethoxy whereby R 3 , R 4 and R 5 are not all hydrogen, and whereby when two of R 3 , R 4 and R 5 are hydrogen the third of R 3 , R 4 and R 5 is not methyl. The compounds are potent gastric acid secretion inhibitors.

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