Abstract: This invention relates to tricyclo compounds useful for treatment and prevention of resistance by transplantation, graft-versus-host diseases by medulla ossium transplantation, autoimmune diseases, infectious diseases, and the like, which can be represented by the following formula: ##STR1## to a process for their production, to a pharmaceutical composition containing the same and to a use thereof.

Abstract: This invention relates to tricyclo compounds useful for treatment and prevention of resistance by transplantation, graft-versus-host diseases by medulla ossium transplantation, autoimmune diseases, infectious diseases, and the like, which can be represented by the following formula: ##STR1## to a process for their production, to a pharmaceutical composition containing the same and to a use thereof.

Abstract: This invention relates to tricyclo compounds useful for treatment and prevention of resistance by transplantation, graft-versus-host diseases by medulla ossium transplantation, autoimmune diseases, infectious diseases, and the like, which can be represented by the following formula: ##STR1## to a process for their production, to a pharmaceutical composition containing the same and to a use thereof.

Abstract: This invention is concerned with a method for the production of thioalkylene glycols by using the reaction solvent containing mainly the thioalkylene glycol, the product of the reaction of alkylene oxide and hydrogen sulfide, without using any other special solvent or inert solvent, in the presence of anion exchange resin as the catalyst, the method which enables the simple, economical and high-yield production of thioalkylene glycols because a high pressure is not necessarily required and the purification and isolation are carried out very easily.For example, according to this invention, thioethylene glycol was obtained in a 91% yield from ethylene oxide and hydrogen sulfide in the mixture of thioethylene glycol and thiodiethylene glycol as the solvent in the presence of the anion exchange resin as the catalyst. Similarly, thiopropylene glycol in a 95% yield from propylene oxide and hydrogen sulfide in thiopropylene glycol as the solvent, and thio-.alpha.-butylene glycol in a 94% yield from .alpha.

Abstract: A stabilized power supply circuit has a stabilized or regulator circuit connected between an input terminal and a first output terminal and a constant voltage element for example, a Zener diode, whose one electrode is connected to the input terminal and whose other electrode is connected to the first output terminal, and a second output terminal is connected to the first-mentioned electrode of the constant voltage element.