Seventeen N-ethanethiol pyrroles have been prepared and tested as radioprotective agents. This is the first time that pyrrole compounds with radioprotective activity have been reported. The dimethyl pyrrole derivative 3a and its corresponding disulfur 4a exhibited strong long-lasting effects.
Disclosed is a composition comprising (A) at least one compound selected from the group consisting of an ether compound having two or more ether groups, a trivalent phosphorus compound, and a ketone compound, (B) a boron trihalide, and (C) an episulfide compound.