4-(1-benzyloxycarbonyl-2-phenyl-ethylcarbamoyl)-4-{2-[(2-{2-[2-tert-butoxycarbonylamino-3-(trityl-carbamoyl)-propionylamino]-1-hydroxy-4-methyl-pentyl}-cyclopentanecarbonyl)-amino]-propionylamino}-butyric acid benzyl ester

4-(1-benzyloxycarbonyl-2-phenyl-ethylcarbamoyl)-4-{2-[(2-{2-[2-(2-tert-butoxycarbonylamino-3-methyl-butyrylamino)-3-(trityl-carbamoyl)-propionylamino]-1-hydroxy-4-methyl-pentyl}-cyclopentanecarbonyl)-amino]-propionylamino}-butyric acid benzyl ester