1 HMK (6ar,12ar)-6h-[1,3]dioxolo[5,6][1]benzofuro[3,2-C]chromene-3,6a(12ah)-diol 1.000 2 P1S (6ar,12ar)-3-(hydroxymethyl)-6h-[1,3]dioxolo[5,6][1]benzofuro[3,2-C]chromen-6a(12ah)-ol 0.875 3 CUE Coumestrol 0.750 4 ZF1 7-hydroxy-3-(4-hydroxyphenyl)-4h-chromen-4-one 0.708