Abstract: The invention provides compounds of formula ##STR1## wherein A and B are hydrogen and R is hydrogen or cycloalkyl, or A and B together form an additional bond and R is cycloalkyl or cycloalkyl-alkyl. Useful in treating pathological disturbancies involving an anoxia factor.

Abstract: Compounds of the formula: ##STR1## in which R represents a group of the formula: ##STR2## in which n represents an integer of 1 to 5 and R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom or a linear or branched, saturated or unsaturated aliphatic hydrocarbon group containing 1 to 5 carbon atoms, or R.sub.1 and R.sub.2, together with the nitrogen atom to which they are attached, form a heterocyclic ring having 5 to 7 ring members, which heterocyclic ring optionally contains a second hetero-atom and/or one or more substituent groups, and their pharmaceutically acception acid addition salts, which compounds and salts are particularly suitable for use as analgesics.

Abstract: Compounds of the general formula ##SPC1##Wherein R.sub.1 is H or OH and R.sub.2 is H or R.sub.1 and R.sub.2 together represent an additional double bond between the two carbon atoms to which they are attached and m and n are integers of 1 to 5 and 2 to 7 respectively; and pharmaceutically acceptable acid addition salts thereof. The compounds are useful for the treatment of vascular disorders in mammals.

Abstract: The invention provides compound of formula ##SPC1##Wherein R.sub.1 is alkyl or substituted or unsubstituted phenyl or 3-pyridyl, and R.sub.2 is hydrogen, halogen, alkoxy or trifluoromethyl, methoxy or methylthio. The compounds are useful as analgesic agents.