(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-acetamido-4-methyl-pentanoyl]amino]-4-methyl-pentanoyl]amino]-4-methyl-pentanoyl]amino]-3-methyl-pentanoyl]amino]-5-guanidino-pentanoyl]amino]-3-methyl-butanoyl]amino]-6-amino-N-[(4-carbamimidoylphenyl)methyl]hexanamide