40283-52-1 BRN 3953611 Methanethiol, N-cyclopropylamidino-, hydrogen thiosulfate NSC 187533 S-((N-Cyclopropylamidino)methyl) hydrogen thiosulfate Thiosulfuric acid (H2S2O3), S-(2-(cyclopropylamino)-2-iminoethyl) ester (9CI)