Abstract: The present invention provides a compound of formula (I) ##STR1## and salts and solvates thereof, and describes processes for their preparation, pharmaceutical compositions containing them and their use in the treatment of viral diseases, especially those caused by the Herpetoviridae.

Abstract: 1-Aminoethyl, 1-aminopropyl and 1-aminobutyl derivatives of 7,7-dimethylnorbornane are described. The amino groups are optionally substituted, for example by alkyl groups, or may be saturated heterocyclic amino groups. The alkylene group at the 1-position can also be substituted, and the 2-position can be substituted by chlorine. The compounds have CNS activity.

Abstract: Steroid anaesthetics of the pregnane and 19-norpregnane series are described, the compounds possessing a 3.alpha.-hydroxy group, a 5.alpha.-hydrogen atom or a 4,5-double bond, a 17.alpha.-hydrogen atom, a 20-oxo group and at the 21-position a hydrocarbon group which may be substituted by an oxo, ether, hydroxy, acyloxy, esterified carboxy, thioether, thioester, heterocyclic, amino or aromatic group, or a fluorine or chlorine atom. The acetals and 20-enol ethers of compounds having a 21-formyl group are also described.

Abstract: Steroids of the androstane and pregnane series possessing a 2.alpha.-hydrogen or halogen or an alkyl group; a 3.alpha.-hydroxy or acyloxy group, a 3.beta.-hydrogen or alkyl group; an 11.beta.-hydrogen or hydroxy group or an epoxy group linked also to the 9-position; an 11.alpha.-hydrogen or alkyl or allyl group; or an 11-oxo group; a 16 hydrogen or halogen or a methyl or dimethyl group; a 20-oxo or ethylenedioxy group; and a 20-methyl or alkoxy group. The compounds may be unsaturated at the 1(2), 8(9) or 9(11) positions.The compounds possess anaesthetic properties.