Showing structure for methyl 3-[3'-(acetyloxy)-11'-(furan-3-yl)-2',3,3,6',10'-pentamethyl-4',13'-dioxo-12',15'-dioxaspiro[oxirane-2,5'-tetracyclo[8.5.0.0¹,¹⁴.0²,⁷]pentadecan]-6'-yl]prop-2-enoate