2-Phe-6-trp-LHRH 67190-22-1 GNRH, phe(2)-trp(6)- LHRH, Phe(2)-trp(6)- LHRH, phenylalanyl(2)-tryptophan(6)- Luteinizing hormone-releasing factor (pig) , 2-D-phenylalanine-6-D-tryptophan-