2-Methyl-2-thiopseudourea sulfate 2-Methyl-2-thiopseudourea sulfate (2:1) 867-44-7 Carbamimidothioic acid, methyl ester, sulfate (2:1) Methylthiopseudourea sulfate NSC516 Pseudourea, 2-methyl-2-thio-, hydrogen sulfate Pseudourea, 2-methyl-2-thio-, sulfate (2:1) S-Methylisothiourea hemisulfate S-Methylisothiourea sulfate (2:1) S-Methylthiouronium sulfate (2:1) Usaf ek-1231