[Lys4] Sarafotoxin S6c

O=C([C@H]1NC([C@@H](NC([C@@H](NC([C@@H](NC([C@@]2([H])NC([C@@H](NC([C@@H](NC([C@@H](NC([C@](NC([C@@H](NC([C@@H](NC([C@@H](NC([C@@](CSSC2)([H])NC([C@](NC([C@H](CSSC1)N)=O)([H])[C@H](O)C)=O)=O)CCCCN)=O)CC(O)=O)=O)CCSC)=O)([H])[C@H](O)C)=O)CC(O)=O)=O)CCC(O)=O)=O)CCC(O)=O)=O)=O)CC(C)C)=O)CC(N)=O)=O)CC3=CC=CC=C3)=O)N[C@@H](CC4=CN=CN4)C(N[C@@H](CCC(N)=O)C(N[C@@H](CC(O)=O)C(N[C@@H](C(C)C)C(N[C@@H]([C@@H](C)CC)C(N[C@H](C(O)=O)CC5=CNC6=CC=CC=C56)=O)=O)=O)=O)=O

[1]Schoeffter P, et al. Differences between endothelin receptors mediating contraction of guinea-pig aorta and pig coronary artery. Eur J Pharmacol. 1993 Nov 9;249 (2) :199-206.