[Radioprotective and toxicological properties on some 4-oxyhexa- and 1,2,3,6-tetrahydroprimidine-2-thione derivatives].

Test on mice demonstrated the radio-protective activity of 12 derivatives of 4-oxyhexahydropyrimidinethione-2 and 1,2,3,6-tetrahydropyrimidinethione-2 well-marked with intraperitoneal administration 10--20 minutes prior to irradiation (1000 r, exposure dose rate--10 r/min). As a whole the tetrahydroderivates are more toxic.