| 1-{[(4r,7s,10s,13r,16s,19r)-19-amino-7-(2-amino-2-oxoethyl)-13-benzyl-10-[3-(diethylamino)-3-oxopropyl]-16-(4-hydroxybenzyl)-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentaazacycloicosan-4-yl]carbonyl}-l-prolyl-n<sup>5</sup>-(diaminomethylidene)-l-orn |
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