N-[(2S,4R)-2-[[N-[N-[N-[(2S,4R)-2-amino-4-methylheptanoyl]-N-methyl-L-leucinyl]-L-leucinyl]-N1'-methoxy-N-methyl-L-tryptophanyl]amino]-4-methylheptanoyl]-N-methyl-L-alanine methyl ester