Showing structure for 2',20'-dihydroxy-1',3,9',13',13',18'-hexamethyl-5-oxo-8',23'-dioxaspiro[furan-2,6'-tetracyclo[13.8.0.0⁴,⁹.0¹⁷,²²]tricosane]-11',17',19',21'-tetraen-7'-ylideneacetic acid