methyl (R)-4-<
(R)-4-<
methyl (R)-4-<
methyl (R)-4-<
(2S,3S,4R)-3-Acetoxy-4-[(2S,3R)-2-benzyloxycarbonylamino-3-tert-butoxy-3-(1H-imidazol-4-yl)-propionylamino]-2-methyl-pentanoic acid methyl ester