Showing structure for (19'e)-5',14',26'-trimethyl-2',10',13',17',24'-pentaoxaspiro[oxirane-2,27'-pentacyclo[23.2.1.0³,⁸.0⁸,²⁶.0¹²,¹⁴]octacosane]-4',19',21'-triene-11',18',23'-trione