1-methyltetrahydropyrimidine-2(1H)-thione, N-methyl-N,N'-propylenethiourea, 3,4,5,6-tetrahydro-1-methyl-2-pyrimidinethione, 1-methyl-tetrahydro-pyrimidine-2-thione, N-methylpropylenethiourea, 2(1H)-PYRIMIDINETHIONE, TETRAHYDRO-1-METHYL-, 1-methyl-hexahydro-pyrimidine-2-thione