(S)-methyl 2-((2S,5S,6S)-5-methyl-6-((2S,3S,4S,5S,6S,7R,10E,12R,13R,14E,16R)-3,5,7,13-tetrahydroxy-4,6,12,14,16-pentamethylnonadeca-10,14-dien-2-yl)tetrahydro-2H-pyran-2-yl)propanoate