Sodium (2S)-2-{(2R,5S)-6-[(2S,3R,4R,6S)-6-{(2R,5S,7R,10S,12R,15R)-2-[(5R,6S)-5-ethyl-5-hydroxy-6-methyltetrahydro-2H-pyran-2-yl]-15-hydroxy-2,10,12-trimethyl-1,6,8-trioxadispiro[4.1.5.3]pentadec-13-en
-9-yl}-3-hydroxy-4-methyl-5-oxo-2-octanyl]-5-methyltetrahydro-2H-pyran-2-yl}butanoate