Showing structure for (1r,2r,4s,7s,8s,11r,12r,18s,20s)-7-(furan-3-yl)-18,20-dihydroxy-20-methoxy-1,8,12,17,17-pentamethyl-3,6,16-trioxapentacyclo[9.9.0.0²,⁴.0²,⁸.0¹²,¹⁸]icos-13-ene-5,15,19-trione