| 摘要 |
A description is given of esters of 1,4-ethano-10-hydroxy-5-oxo-5H-[1]benzopyrano[3,4-b]pyridine derivatives of formula: <IMAGE> where R represents a straight or branched alkanoyl radical containing 2 to 8 carbon atoms, or a radical of formula: <IMAGE> where Y represents a straight or branched alkylene radical containing 1 to 8 carbon atoms, a is an integer from 1 to 4, b is an integer from 1 to 4, X represents CH2, O, S or NR1, where R1 represents a hydrogen atom or a lower alkyl radical, with the proviso that, when X represents O, S or NR1, the sum of a and b is equal to 3 or 4; and of their acid addition salts which are suitable in pharmacy. These compounds constitute medicaments which are useful especially for lowering intraocular pressure and as mild tranquillisers. |
