Showing structure for (1s,2s,6s,7s,9r,13s,14r,15s,16s,17s)-11,16-dihydroxy-4,15-dimethoxy-2,6,14,17-tetramethyl-10-oxatetracyclo[7.7.1.0²,⁷.0¹³,¹⁷]heptadec-4-en-3-one