Figure 4
From: Synthesis of prenylated flavonols and their potents as estrogen receptor modulator

The reaction products of icariin hydrolysed by TFA firstly and then cellulase. Yields of 2, 10.5%; 3, 7.3%; 4, 4.4%; 6, 28.8%; 7, 16.9%; 8, 25.3%; 9, 2.1%.