(3E,5E,8S,9E,11S,12R,13E,15E,18S)-3-[[[6-Deoxy-4-O-(3,5-dichloro-2-ethyl-4,6-dihydroxybenzoyl)-2-O-methyl-beta-L-mannopyranosyl]oxy]methyl]-12-[(6-deoxy-5-C-methyl-beta-D-lyxo-hexopyranosyl)oxy]-11-ethyl-8-hydroxy-18-[(1R)-1-hydroxyethyl]-9,13,15-trimethyl-oxacyclooctadeca-3,5,9,13,15-pentaen-2-one, OP 1118, OPT 1118