85541-78-2 Fertilization promoting peptide Glp-glu-pronh2 L-Prolinamide, 5-oxo-L-prolyl-L-alpha-glutamyl- Pglu-glu-pro-amide Pglu-glu-pronh2 Pyroglutamyl-glutamyl-prolinamide Pyroglutamyl-glutamyl-prolineamide pyroglutamyl-glutamyl-proline amide