| 摘要 |
The invention provides a compound of the formula I <IMAGE> I wherein Y is a heterocyclic radical of formula <IMAGE> wherein R is hydrogen or lower alkyl, R1 is hydrogen, hydroxy, lower alkyl, hydroxyloweralkyl, loweralkoxyloweralkyl, loweralkoxy, halogen, formyl, phenyl, phenylalkyl, halophenyl, or acetal [CH(OR4)2 where R4 is lower alkyl or two R4 radicals are joined to form a lower alkylene chain], m is 1 or 2, the dotted lines in formula V represent an optional double bond in one of the indicated positions, A is a saturated or unsaturated alkylene radical having from 1 to 6 carbon atoms, which may be substituted by lower alkyl of 1 to 6 carbon atoms, S is sulphur and R3 is lower alkyl, phenyl or aralkyl of 7 to 12 carbon atoms and Z- is an anion, and acid addition salts thereof, with the provisos that (1) when more than one R1 radical is present in the molecule then the R1 radicals may be the same or different and (2) A is linked to the 2 or 3 position of the pyridine ring. The compounds are useful as anti-ulcer or anti-secretory agents. Methods of treating ulcers and anti-ulcer compositions are described.
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