(+)-Simalikalactone D 2H-3,11c-(Epoxymethano)phenanthro[10,1-bc]pyran,picras-3-ene-2,16-dione deriv. 35321-80-3 NSC266494 Picras-3-ene-2,16-dione, 13,20-epoxy-1,11,12- trihydroxy-15-(2-methyl-1-oxobutoxy)-,[1.beta.,11.beta.,12.alpha.,15.beta.(R)]- SIMALIKALACTONE D Similikalactone D