18-[3-(2,4-dihydroxy-5-methyl-6-propenyl-tetrahydro-pyran-2-yl)-2-hydroxy-1-methyl-butyl]-9-ethyl-3,17-dimethoxy-5,7,11,13-tetramethyl-8,10-bis-triethylsilanyloxy-oxacyclooctadeca-3,5,13,15-tetraen-2-one

Benzoic acid (7E,9E,17E,19Z)-(1R,2R,3R,4R,5R,6S,12R,13S,14S,15R,16R)-3-(diethyl-isopropyl-silanyloxy)-14-ethyl-5-hydroxy-6,20-dimethoxy-20-methoxycarbonyl-1,2,4,10,12,16,18-heptamethyl-13,15-bis-triethylsilanyloxy-icosa-7,9,17,19-tetraenyl ester