preferred_name: BENZENEBUTANOIC ACID, N-(8-METHYL-1-OXODECYL)-L-TRYPTOPHYL-D-ASPARAGINYL-L-.ALPHA.-ASPARTYL-L-THREONYLGLYCYL-L-ORNITHYL-L-.ALPHA.-ASPARTYL-D-ALANYL-L-.ALPHA.-ASPARTYLGLYCYL-D-SERYL-(3R)-3-METHYL-L-.ALPHA.-GLUTAMYL-.ALPHA.,2-DIAMINO-.GAMMA.-OXO-, (13->4)-LACTONE, (.ALPHA.S)-