IUPAC:(2R,6R)-6-[(1S,3R,5S,8S,12R,13R,15S,20R)-5-hydroxy-4,4,8,12,17,17,20-heptamethyl-10-oxo-16,18-dioxapentacyclo[10.6.2.0^{3,8}.0^{9,19}.0^{15,20}]icos-9(19)-en-13-yl]-2-methyl-4-oxoheptanoic acid
IUPAC:(2R,6R)-6-[(1S,3R,5S,8S,12R,13R,15S,20R)-5-hydroxy-4,4,8,12,17,17,20-heptamethyl-10-oxo-16,18-dioxapentacyclo[10.6.2.0^{3,8}.0^{9,19}.0^{15,20}]icos-9(19)-en-13-yl]-2-methyl-4-oxoheptanoic acid