Macbecin
(2E,4Z,8E)-15-(5-Amino-3,6-dioxo-cyclohexa-1,4-dienyl)-7-carbamoyloxy-11,12,15-trimethoxy-2,6,8,10,14-pentamethyl-pentadeca-2,4,8-trienoic acid methyl ester
(E)-2-Methyl-4-oxo-but-2-enoic acid {5-[3-(5-acetyl-3-methoxy-4-methyl-tetrahydro-furan-2-yl)-1-methoxy-2-methyl-propyl]-3,6-dioxo-cyclohexa-1,4-dienyl}-amide
acetic anhydride
Acetic acid (4E,6Z,10E)-(8S,9R,12S,13R,14S,16S,17R)-20-acetoxy-2-acetyl-9-carbamoyloxy-13,14,17-trimethoxy-4,8,10,12,16-pentamethyl-3-oxo-2-aza-bicyclo[16.3.1]docosa-1(22),4,6,10,18,20-hexaen-22-yl ester