138749-61-8 Cyclo(L-alanylglycyl-L-arginylglycyl-L-alpha-aspartyl-L-seryl-L-alpha-aspartyl) Cyclo(gly-arg-gly-asp-ser-asp-ala) Cyclo(glycyl-arginyl-glycyl-aspartyl-seryl-aspartyl-alanyl) Cyclo(grgdspa)