Showing structure for methyl 2-[(1s,3s,5s,7s,10s,11s,13z,15r,16r,19r,20r,21r,24r,26s,29r)-1,11,16,21-tetrahydroxy-10,20,24,29-tetramethyl-5-(2-methylprop-1-en-1-yl)-9,25-dioxo-4,8,27,28-tetraoxapentacyclo[17.7.1.1³,⁷.1¹¹,¹⁵.0²¹,²⁶]nonacosan-13-ylidene]acetate