143120-27-8 Cyclo(S-acetyl-tyrosyl-arginyl-glycyl-aspartyl-cysteinyl-OH) (sulfoxide) Cyclo-S-Ac-tyr-arg-gly-asp-cys-OH (sulfoxide) Cyclo-S-Ac-tyr-rgd-cys-OH (sulfoxide) G 4120 G-4120 L-Cysteine, N-(mercaptoacetyl)-D-tyrosyl-L-arginylglycyl-L-alpha-aspartyl-, cyclic (1-5)-disulfide, S-oxide