1,2,3,4-Tetrahydronapthalene derivatives of formula (I) wherein R<1> is selected from hydrogen, C1-6alkyl, C2-6alkenyl, C2-6alkynyl and phenylC2-6alkyl and R<2>, R<3>, R<4> and R<5> are as defined in the specification are described, together with processes for their manufacture and compositions containing them. Compounds of formula (I) are pharmacologically useful.
1,2,3,4-TETRAHYDRONAPHTHALENES AND THEIR PHARAMACEUTICAL USE