[D-Pro2, D-Phe7, D-Trp9] Substance P

[D-Pro2, D-Phe7, D-Trp9] Substance P, an analogue of Substance P, serves as an inhibitor to its parent compound and indirectly contracts the guinea-pig ileum (GPI) [1] [2].

C([C@@H](NC([C@@H](NC([C@@H](CC1=CC=CC=C1)NC([C@@H](NC([C@@H](NC(=O)[C@H]2N(C([C@@H](NC(=O)[C@@H]3N(C([C@H](CCCNC(=N)N)N)=O)CCC3)CCCCN)=O)CCC2)CCC(N)=O)=O)CCC(N)=O)=O)=O)CC4=CC=CC=C4)=O)C(N[C@H](C(N[C@@H](CCSC)C(N)=O)=O)CC(C)C)=O)C=5C=6C(NC5)=CC=CC6