10-(4-aminobutyl)-19-[(2-amino-3-naphthalen-2-yl-propanoyl)amino]-N-(1 -carbamoyl-2-hydroxy-propyl)-16-[(4-hydroxyphenyl)methyl]-13-(1H-indol -3-ylmethyl)-6,9,12,15,18-pentaoxo-7-propan-2-yl-1,2-dithia-5,8,11,14, 17-pentazacycloicosane-4-carboxamide