117399-94-7 121395-76-4 132244-33-8 Endotelin-1(porcine) Endothelin 1 (Rana ridibunda) Endothelin 1 (Rat) Endothelin 1 (human) Endothelin 1 (pig) Endothelin 1 (swine) Human endothelin Human endothelin (1-21) Human endothelin 1 Porcine endothelin Porcine endothelin(1-21) Porcine endothelin-1