. . . . . . . . . . . . . . . . . "Henricus C. J. Ottenheijm, \"Sparsomycin (SC-RS) compounds having antitumor activity, a process for their preparation and pharmaceutical compositions containing sparsomycin (SC-RS) compounds.\" U.S. Patent US4820712, issued April, 1986."@en . "Sparsomycin"@en . . . . . . . . . . . . . "An antitumor antibiotic produced by Streptomyces sparsogenes. It inhibits protein synthesis in 70S and 80S ribosomal systems. [PubChem]"@en . . . "experimental"@en . . .