(D-Phe(sup 2)-pro(sup 3)-D-phe(sup 6))-LHRH 64789-67-9 LHRH, phe(2)-pro(3)-phe(6)- Luteinizing hormone-releasing factor (pig), 2-D-phenylalanine-3-L-proline-6-D-phenylalanine- Luteinizing hormone-releasing factor(pig), 2-D-phenylalanine-3-L-proline-6-D-phenylalanine