CHEMOTHERAPY 



149 



CH3-C 



CHjOH / 



his (pantoyl- p-aminoethyl) disulphide, 



CH3—C.CHOH.CO.NH.CH2.CH2I2SJ, 

 CH^QH / j 



are about equal in their activity against L. arahinosus 

 and Str. jnjogenes, in vitro and in vivo respectively. 



It has been found possible to protect rats against 

 many thousand lethal doses of Str. pyogenes by frequent 

 subcutaneous injections of panto yltaurine in amount 



Table 14 



