Novel carbamates, their preparation, and pharmaceutical formulations containing these compounds

A compound of the formula I ##STR44## where the broken line is a double bond which may or may not be hydrogenated and the radicals A are each hydrogen, or the two radicals A together are a bridge, joining the two carbon atoms, of the formula --(CH.sub.2).sub.m --, where m is an integer from 1 to 3, and which may or may not be substituted by 1, 2 or 3 lower alkyl, or a bridge of the formula ##STR45## where n is an integer from 2 to 4, and R.sup.1 is hydrogen, or is a saturated straight-chain or branched alkyl radical of 1 to 12 carbon atoms, which is unsubstituted, or is monosubstituted, disubstituted or trisubstituted by halogen, lower alkoxy or lower alkylthio, or is monosubstituted by cyano or by cycloalkyl of 3 to 6 carbon atoms in the ring, which ring is unsubstituted or substituted by 1, 2 or 3 lower alkyl and may, in the case of a 5-membered or 6-membered ring, have 1 or 2 carbon atoms replaced by oxygen or sulfur, or by bicycloalkyl of 5 to 8 carbon atoms in the bicyclic system, which is unsubstituted or substituted by 1, 2 or 3 lower alkyl, or is monosubstituted or disubstituted by phenyl, furyl or thienyl, which are unsubstituted or substituted by halogen, lower alkyl or lower alkoxy, or is alkenyl or alkynyl of 2 to 12 carbon atoms, alkenyl being unsubstituted or substituted by 1, 2 or 3 chlorine atoms, or is cycloalkyl of 3 to 7 carbon atoms in the ring, which ring is unsubstituted or substituted by 1, 2, 3 or 4 lower alkyl or by phenyl and may, in the case of a 5-membered or 6-membered ring, have 1 or 2 carbon atoms replaced by oxygen or sulfur, or is bicycloalkyl of 5 to 8 carbon atoms in the bicyclic system, which is saturated or unsaturated and is unsubstituted or substituted by 1, 2 or 3 lower alkyl, or is phenyl, furyl or thienyl, which is unsubstituted or monosubstituted or disubstituted by halogen, lower alkyl or lower alkoxy, R.sup.2 is saturated straight-chain or branched alkyl of 1 to 6 carbon atoms and R.sup.3 and R.sup.4 independently of one another are each hydrogen or lower alkyl.