| 摘要 |
Histamine H2-antagonists of the formula <IMAGE> wherein p is 1 or 2; R<1> is hydroxy, amino or specified substituted amino and or 5- to 7-membered fully saturated nitrogen-containing heterocyclic ring attached via its nitrogen atom; m is an integer of from 0 to 2; n is an integer of from 2 to 4; Z is sulfur, oxygen or methylene: and A is an optionally substituted phenyl, imidazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, triazolyl, thiadiazolyl, oxadiazolyl, furyl, thienyl or pyridyl ring; and nontoxic pharmaceutically acceptable salts, hydrates, solvates or N-oxides thereof are anti-ulcer agents. Intermediates of the formulae <IMAGE> are also claimed.
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