the salts of the natural polyamines , protamine sulphate , clupeine sulphate , spermidine phosphate , putrescine dihydrochloride and spermine diphosphate , and of the synthetic poly-l-lysine hydrobromide ( mol . wt 85 k ) and poly-l-arginine hydrochloride ( mol . wt 50 k ) were tested for their effect on film sarcoma by application in gel to nitrocellulose filters that were implanted in groups of 20-45 balb/c mice .
C0037871
phosphate
C0034170
putrescine