Showing structure for (17s)-5,13,17-trihydroxy-7,12-dimethyl-9,15-dioxo-2,10,16-trioxatetracyclo[9.7.0.0³,⁸.0¹⁴,¹⁸]octadeca-1(18),3(8),4,6,11,13-hexaene-4-carbaldehyde