80658-46-4 GF 94 GF-94 L-Proline, 1-(1-(N-(N2-(1-(N2-(3,4-didehydro-1-(N-L-alpha-glutamyl-L-tryptophyl)-L-prolyl)-L-arginyl)-L-prolyl)-L-glutaminyl)-L-isoleucyl)-L-prolyl)-