84676-91-5 Aptlsp Argininyl(1)-prolyl(2)-tryptophyl-7,9-leucinamide(11)-substance P D-Arg(1)-D-pro(2)-D-trp-7,9-leunh(2)(11)-substance P Substance P, 1-D-arginine-2-D-proline-7-D-tryptophan-9-D-tryptophan-11-L-leucinamide- Substance P, arg(1)-pro(2)-trp(7),(9)-leunh(2)(11)-