Showing structure for 15-(3,4-dimethyl-5-oxo-2h-furan-2-yl)-4,5,13,17-tetrahydroxy-10,16,20-trimethyl-14-oxapentacyclo[11.6.1.0²,¹¹.0⁵,¹⁰.0¹⁷,²⁰]icos-7-en-9-one