40283-53-2 BRN 3959215 Methanethiol, N-cyclopentylamidino-, hydrogen thiosulfate NSC 193462 S-((N-Cyclopentylamidino)methyl) hydrogen thiosulfate Thiosulfuric acid (H2S2O3), S-(2-(cyclopentylamino)-2-iminoethyl) ester (9CI)