Cyclo[L-alanyl-3-amino-5-[(1-oxohexadecyl)- amino]benzoyl-L-alanyl-3-amino-5-[(1- oxohexadecyl)amino]benzoyl-L-alanyl-3- amino-5-[(1-oxohexadecyl)amino]benzoyl-Lalanyl- 3-amino-5-[(1-oxohexadecyl)amino]- benzoyl]