1,4,5,6-Tetrahydro-1-methyl-2-pyrimidinethiol 2(1H)-Pyrimidinethione, tetrahydro-1-methyl- 24421-05-4 29306-58-9 EINECS 246-238-0 Tetrahydro-1-methyl-1H-pyrimidine-2-thione