CAS No 6917-99-3 , 1-[13-benzyl-10-(2-carbamoylethyl)-7-(carbamoylmethyl)-16-[(4-hydroxyphenyl)methyl]-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carbonyl]-N-[1-(carbamoylmethylcarbamoyl)-4-(diaminomethylideneamino)butyl]pyrrolidine-2-carboxamide