psorospermin

(2R)-1,2-Dihydro-10-hydroxy-5-methoxy-2-[(2R)-2-methyloxiranyl]-6H-furo[2,3-c]xanthene-6-one

(2R)-2α-[(2R)-2-Methyloxirane-2β-yl]-5-methoxy-10-hydroxy-1,2-dihydro-6H-furo[2,3-c]xanthene-6-one