| abstract |
Antagonists of histamine H2 receptors, which antagonists inhibit gastric secretion in animals and are suitable for treating ulcerous disorders, have the following formula in which R<2> represents a straight-chain or branched-chain alkynyl group having 3-9 C atoms, including non-toxic, pharmaceutically useful, acid addition salts thereof. Starting materials for preparing the said compounds and processes for their preparation. |