Chaetiacandin

1,5-Anhydro-1-C-[2,4-dihydroxy-6-(hydroxymethyl)phenyl]-4-O-[6-O-(1-oxo-2,4-decadienyl)-β-D-galactopyranosyl]-D-glucitol 3-(7-hydroxy-2,4,8,10-tetradecatetraenoate)