CAS No 153507-46-1 , L-Cysteinamide,13S,13'S-[oxybis[methylene(2,5-dioxo-1,3-pyrrolidinediyl)]]bis[N-(2-mercaptoacetyl)-D-tyrosyl-S-(3-aminopropyl)-L-cysteinylglycyl-L-a-aspartyl-L-cysteinylglycylglycyl-S-[(acetylamino)methyl]-L-cysteinylglycyl-S-[(acetylamino)methyl]-L-cysteinylglycylglycyl-,cyclic (1®