去氨加压素

1-{[(4R,7S,10S,13S,16S)-7-(2-Amino-2-Oxoethyl)-10-(3-Amino-3-Oxopropyl)-13-Benzyl-16-(4-Hydroxybenzyl)-6,9,12,15,18-Pentaoxo-1,2-Dithia-5,8,11,14,17-Pentaazacycloicosan-4-Yl]Carbonyl}-L-Prolyl-N~5~-(Diaminomethylidene)-D-Ornithylglycinamide