135329-52-1 Cyclo(asn-thr-ser-phe-thr-pro-arg-leu) Cyclo(asparaginyl-threonyl-seryl-phenylalanyl-threonyl-prolyl-arginyl-leucyl) Cyclo(atsptpal) Leucopyrokinin, 1-L-asparagine-8-L-leucine-, cyclic (B-1)-peptide