101020-48-8 Arg-thr-pro-pro-pro-ser-gly Arginyl-threonyl-prolyl-prolyl-prolyl-seryl-glycine Glycine, N-(N-(1-(1-(1-(N-L-arginyl-L-threonyl)-L-prolyl)-L-prolyl)-L-prolyl)-L-seryl)- N-(N-(1-(1-(1-(N-L-Arginyl-L-threonyl)-L-prolyl)-L-prolyl)-L-prolyl)-L-seryl)glycine SP 6 SP 7