Showing structure for (20e)-7-butyl-11,16,23,24,25-pentahydroxy-10,19,21-trimethyl-15-methylidene-8,13,28,29-tetraoxatetracyclo[22.3.1.1³,⁶.0¹²,¹⁴]nonacos-20-ene-9,18-dione