Showing structure for (2r)-n-[(4s,4ar,6r,8s,8ar)-8-methoxy-7,7-dimethyl-6-{[(2r)-6-oxooxan-2-yl]methyl}-hexahydropyrano[3,2-d][1,3]dioxin-4-yl]-2-hydroxy-2-[(2r,5r,6r)-2-methoxy-5,6-dimethyl-4-methylideneoxan-2-yl]ethanimidic acid