Synonyms: Endothelin1 (pig), big;33,34,49,50-Tetrathia-2,5,8,11,14,17,20,23,26,29,37,40,43,46-tetradecaazabicyclo[23.22.4]henpentacontane,cyclic peptide deriv.; Big porcine endothelin(1-39); Endothelin-39 (pig); Humanproendothelin-1; Porcine big endothelin; Porcine big endothelin(1-39); Porcinebig endothelin-1; Porcine proendothelin(1-39)