Antibiotic IOW-6 Cyclo[D-Tyr-D-Asp(NH2)-L-Glu(NH2)-L-Pro-D-Asp(NH2)-L-Ser-3-(11-methyldodecyl)-βAla-L-Asp(NH2)-] IOW-6 Iturin A6 Iturin A-6 Cyclo[(3R)-3-amino-14-methylpentadecanoyl-L-asparaginyl-D-tyrosyl-D-asparaginyl-L-glutaminyl-L-prolyl-D-asparaginyl-L-seryl]