Showing structure for 14-ethoxy-5,18-dihydroxy-7,12-dimethyl-9,16-dioxo-2,10,15-trioxatetracyclo[9.7.0.0³,⁸.0¹³,¹⁷]octadeca-1(11),3,5,7,12,17-hexaene-4-carbaldehyde