USP-1477591

(Bis{D-phenylalanyl-L-cysteinyl-L-phenylalanyl-D-tryptophyl-L-lysyl-L-threonyl-N-[(2R,3R)-1,3-dihydroxybutan-2-yl]-L-cysteinamide} cyclic (2-->2'),(7-->7')-bis(disulfide))