CAS No 1391-36-2 , L-Lysine,L-cysteinyl-L-lysyl-L-glutaminyl-D-cysteinyl-L-cysteinyl-3-aminoalanyl-L-phenylalanylglycyl-L-prolyl-L-phenylalanyl-(2S,3S)-2-amino-3-mercaptobutanoyl-L-phenylalanyl-L-valyl-L-cysteinyl-(3R)-3-hydroxy-L-a-aspartylglycyl-L-asparaginyl-(2S,3S)-2-amino-3-mercaptobutanoyl-,cyclic (6®