The molecule is a 14-membererd macrolide containing ten stereocentres carrying one epoxymethano, three hydroxy and five methyl substituents. It is the aglycone of the antibiotic oleandomycin. It is a macrolide, a cyclic ketone, a triol and a spiro-epoxide.
(3R,5S,6S,7R,8S,9R,12R,13R,14S,15R)-6,8,14-trihydroxy-5,7,9,12,13,15-hexamethyl-1,11-dioxaspiro[2.13]hexadecane-10,16-dione